12 Nov, 2016
1 commit
-
When called more than twice, the nios2_time_init() function return an
uninitialized value, as detected by gcc -Wmaybe-uninitializedarch/nios2/kernel/time.c: warning: 'ret' may be used uninitialized in this function
This makes it return '0' here, matching the comment above the function.
Acked-by: Ley Foon Tan
Signed-off-by: Arnd Bergmann
Signed-off-by: Linus Torvalds
11 Oct, 2016
1 commit
-
Pull nios2 update from Ley Foon Tan:
"Use of_property_read_bool() instead of open-coding it"* tag 'nios2-v4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
nios2: use of_property_read_bool
08 Oct, 2016
1 commit
-
When doing an nmi backtrace of many cores, most of which are idle, the
output is a little overwhelming and very uninformative. Suppress
messages for cpus that are idling when they are interrupted and just
emit one line, "NMI backtrace for N skipped: idling at pc 0xNNN".We do this by grouping all the cpuidle code together into a new
.cpuidle.text section, and then checking the address of the interrupted
PC to see if it lies within that section.This commit suitably tags x86 and tile idle routines, and only adds in
the minimal framework for other architectures.Link: http://lkml.kernel.org/r/1472487169-14923-5-git-send-email-cmetcalf@mellanox.com
Signed-off-by: Chris Metcalf
Acked-by: Peter Zijlstra (Intel)
Tested-by: Peter Zijlstra (Intel)
Tested-by: Daniel Thompson [arm]
Tested-by: Petr Mladek
Cc: Aaron Tomlin
Cc: Peter Zijlstra (Intel)
Cc: "Rafael J. Wysocki"
Cc: Russell King
Cc: Thomas Gleixner
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
06 Oct, 2016
1 commit
-
Use of_property_read_bool instead of open-coding it as fpcu_has.
Convert the members of struct cpuinfo from u32 to bool accordingly as
they are only used as boolean anyhow.Signed-off-by: Tobias Klauser
Acked-by: Ley Foon Tan
04 Oct, 2016
1 commit
-
Pull tty and serial updates from Greg KH:
"Here is the big tty and serial patch set for 4.9-rc1.It also includes some drivers/dma/ changes, as those were needed by
some serial drivers, and they were all acked by the DMA maintainer.Also in here is the long-suffering ACPI SPCR patchset, which was
passed around from maintainer to maintainer like a hot-potato. Seems I
was the sucker^Wlucky one. All of those patches have been acked by the
various subsystem maintainers as well.All of this has been in linux-next with no reported issues"
* tag 'tty-4.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (111 commits)
Revert "serial: pl011: add console matching function"
MAINTAINERS: update entry for atmel_serial driver
serial: pl011: add console matching function
ARM64: ACPI: enable ACPI_SPCR_TABLE
ACPI: parse SPCR and enable matching console
of/serial: move earlycon early_param handling to serial
Revert "drivers/tty: Explicitly pass current to show_stack"
tty: amba-pl011: Don't complain on -EPROBE_DEFER when no irq
nios2: dts: 10m50: Add tx-threshold parameter
serial: 8250: Set Altera 16550 TX FIFO Threshold
serial: 8250: of: Load TX FIFO Threshold from DT
Documentation: dt: serial: Add TX FIFO threshold parameter
drivers/tty: Explicitly pass current to show_stack
serial: imx: Fix DCD reading
serial: stm32: mark symbols static where possible
serial: xuartps: Add some register initialisation to cdns_early_console_setup()
serial: xuartps: Removed unwanted checks while reading the error conditions
serial: xuartps: Rewrite the interrupt handling logic
serial: stm32: use mapbase instead of membase for DMA
tty/serial: atmel: fix fractional baud rate computation
...
27 Sep, 2016
1 commit
-
The tx-threshold parameter sets the TX FIFO low water threshold
trigger for the Altera 16550-FIFO32 soft IP.Signed-off-by: Thor Thayer
Signed-off-by: Greg Kroah-Hartman
14 Sep, 2016
2 commits
-
a) should not leave crap on fault
b) should _not_ require access_ok() in any cases.Cc: stable@vger.kernel.org
Signed-off-by: Al Viro -
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro
04 Aug, 2016
1 commit
-
The dma-mapping core and the implementations do not change the DMA
attributes passed by pointer. Thus the pointer can point to const data.
However the attributes do not have to be a bitfield. Instead unsigned
long will do fine:1. This is just simpler. Both in terms of reading the code and setting
attributes. Instead of initializing local attributes on the stack
and passing pointer to it to dma_set_attr(), just set the bits.2. It brings safeness and checking for const correctness because the
attributes are passed by value.Semantic patches for this change (at least most of them):
virtual patch
virtual context@r@
identifier f, attrs;@@
f(...,
- struct dma_attrs *attrs
+ unsigned long attrs
, ...)
{
...
}@@
identifier r.f;
@@
f(...,
- NULL
+ 0
)and
// Options: --all-includes
virtual patch
virtual context@r@
identifier f, attrs;
type t;@@
t f(..., struct dma_attrs *attrs);@@
identifier r.f;
@@
f(...,
- NULL
+ 0
)Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com
Signed-off-by: Krzysztof Kozlowski
Acked-by: Vineet Gupta
Acked-by: Robin Murphy
Acked-by: Hans-Christian Noren Egtvedt
Acked-by: Mark Salter [c6x]
Acked-by: Jesper Nilsson [cris]
Acked-by: Daniel Vetter [drm]
Reviewed-by: Bart Van Assche
Acked-by: Joerg Roedel [iommu]
Acked-by: Fabien Dessenne [bdisp]
Reviewed-by: Marek Szyprowski [vb2-core]
Acked-by: David Vrabel [xen]
Acked-by: Konrad Rzeszutek Wilk [xen swiotlb]
Acked-by: Joerg Roedel [iommu]
Acked-by: Richard Kuo [hexagon]
Acked-by: Geert Uytterhoeven [m68k]
Acked-by: Gerald Schaefer [s390]
Acked-by: Bjorn Andersson
Acked-by: Hans-Christian Noren Egtvedt [avr32]
Acked-by: Vineet Gupta [arc]
Acked-by: Robin Murphy [arm64 and dma-iommu]
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Aug, 2016
1 commit
-
There was only one use of __initdata_refok and __exit_refok
__init_refok was used 46 times against 82 for __ref.
Those definitions are obsolete since commit 312b1485fb50 ("Introduce new
section reference annotations tags: __ref, __refdata, __refconst")This patch removes the following compatibility definitions and replaces
them treewide./* compatibility defines */
#define __init_refok __ref
#define __initdata_refok __refdata
#define __exit_refok __refI can also provide separate patches if necessary.
(One patch per tree and check in 1 month or 2 to remove old definitions)[akpm@linux-foundation.org: coding-style fixes]
Link: http://lkml.kernel.org/r/1466796271-3043-1-git-send-email-fabf@skynet.be
Signed-off-by: Fabian Frederick
Cc: Ingo Molnar
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
31 Jul, 2016
1 commit
-
Pull DeviceTree updates from Rob Herring:
- remove most of_platform_populate() calls in arch code. Now the DT
core code calls it in the default case and platforms only need to
call it if they have special needs- use pr_fmt on all the DT core print statements
- CoreSight binding doc improvements to block name descriptions
- add dt_to_config script which can parse dts files and list
corresponding kernel config options- fix memory leak hit with a PowerMac DT
- correct a bunch of STMicro compatible strings to use the correct
vendor prefix- fix DA9052 PMIC binding doc to match what is actually used in dts
files* tag 'devicetree-for-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (35 commits)
documentation: da9052: Update regulator bindings names to match DA9052/53 DTS expectations
xtensa: Partially Revert "xtensa: Remove unnecessary of_platform_populate with default match table"
xtensa: Fix build error due to missing include file
MIPS: ath79: Add missing include file
Fix spelling errors in Documentation/devicetree
ARM: dts: fix STMicroelectronics compatible strings
powerpc/dts: fix STMicroelectronics compatible strings
Documentation: dt: i2c: use correct STMicroelectronics vendor prefix
scripts/dtc: dt_to_config - kernel config options for a devicetree
of: fdt: mark unflattened tree as detached
of: overlay: add resolver error prints
coresight: document binding acronyms
Documentation/devicetree: document cavium-pip rx-delay/tx-delay properties
of: use pr_fmt prefix for all console printing
of/irq: Mark initialised interrupt controllers as populated
of: fix memory leak related to safe_name()
Revert "of/platform: export of_default_bus_match_table"
of: unittest: use of_platform_default_populate() to populate default bus
memory: omap-gpmc: use of_platform_default_populate() to populate default bus
bus: uniphier-system-bus: use of_platform_default_populate() to populate default bus
...
27 Jul, 2016
1 commit
-
We always have vma->vm_mm around.
Link: http://lkml.kernel.org/r/1466021202-61880-8-git-send-email-kirill.shutemov@linux.intel.com
Signed-off-by: Kirill A. Shutemov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Jul, 2016
1 commit
-
Pull the clockevents/clocksource tree from Daniel Lezcano:
- Convert the clocksource-probe init functions to return a value in order to
prepare the consolidation of the drivers using the DT. It is a big patchset
but went through 01.org (kbuild bot), linux next and kernel-ci (continuous
integration) (Daniel Lezcano)- Fix a bad error handling by returning the right value for cadence_ttc
(Christophe Jaillet)- Fix typo in the Kconfig for the Samsung pwm (Alexandre Belloni)
- Change functions to static for armada-370-xp and digicolor (Ben Dooks)
- Add support for the rk3399 SoC timer by adding bindings and a slight
change in the base address. Take the opportunity to add the DYNIRQ flag
(Huang Tao)- Fix endian accessors for the Samsung pwm timer (Matthew Leach)
- Add Oxford Semiconductor RPS Dual Timer driver (Neil Armstrong)
- Add a kernel parameter to swich on/off the event stream feature of the arch
arm timer (Will Deacon)
28 Jun, 2016
2 commits
-
All the clocksource drivers's init function are now converted to return
an error code. CLOCKSOURCE_OF_DECLARE is no longer used as well as the
clksrc-of table.Let's convert back the names:
- CLOCKSOURCE_OF_DECLARE_RET => CLOCKSOURCE_OF_DECLARE
- clksrc-of-ret => clksrc-ofSigned-off-by: Daniel Lezcano
For exynos_mct and samsung_pwm_timer:
Acked-by: Krzysztof KozlowskiFor arch/arc:
Acked-by: Vineet GuptaFor mediatek driver:
Acked-by: Matthias BruggerFor the Rockchip-part
Acked-by: Heiko StuebnerFor STi :
Acked-by: Patrice ChotardFor the mps2-timer.c and versatile.c changes:
Acked-by: Liviu DudauFor the OXNAS part :
Acked-by: Neil ArmstrongFor LPC32xx driver:
Acked-by: Sylvain LemieuxFor Broadcom Kona timer change:
Acked-by: Ray JuiFor Sun4i and Sun5i:
Acked-by: Chen-Yu TsaiFor Meson6:
Acked-by: Carlo CaioneFor Keystone:
Acked-by: Santosh ShilimkarFor NPS:
Acked-by: Noam CamusFor bcm2835:
Acked-by: Eric Anholt -
The init functions do not return any error. They behave as the following:
- panic, thus leading to a kernel crash while another timer may work and
make the system boot up correctlyor
- print an error and let the caller unaware if the state of the system
Change that by converting the init functions to return an error conforming
to the CLOCKSOURCE_OF_RET prototype.Proper error handling (rollback, errno value) will be changed later case
by case, thus this change just return back an error or success in the init
function.Signed-off-by: Daniel Lezcano
25 Jun, 2016
1 commit
-
__GFP_REPEAT has a rather weak semantic but since it has been introduced
around 2.6.12 it has been ignored for low order allocations.pte_alloc_one{_kernel} allocate PTE_ORDER which is 0. This means that
this flag has never been actually useful here because it has always been
used only for PAGE_ALLOC_COSTLY requests.Link: http://lkml.kernel.org/r/1464599699-30131-9-git-send-email-mhocko@kernel.org
Signed-off-by: Michal Hocko
Cc: Ley Foon Tan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Jun, 2016
1 commit
-
After patch "of/platform: Add common method to populate default bus",
it is possible for arch code to remove unnecessary callers of
of_platform_populate with default match table.Cc: Ley Foon Tan
Signed-off-by: Kefeng Wang
Signed-off-by: Rob Herring
27 May, 2016
1 commit
-
Pull kbuild updates from Michal Marek:
- new option CONFIG_TRIM_UNUSED_KSYMS which does a two-pass build and
unexports symbols which are not used in the current config [Nicolas
Pitre]- several kbuild rule cleanups [Masahiro Yamada]
- warning option adjustments for gcov etc [Arnd Bergmann]
- a few more small fixes
* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild: (31 commits)
kbuild: move -Wunused-const-variable to W=1 warning level
kbuild: fix if_change and friends to consider argument order
kbuild: fix adjust_autoksyms.sh for modules that need only one symbol
kbuild: fix ksym_dep_filter when multiple EXPORT_SYMBOL() on the same line
gcov: disable -Wmaybe-uninitialized warning
gcov: disable tree-loop-im to reduce stack usage
gcov: disable for COMPILE_TEST
Kbuild: disable 'maybe-uninitialized' warning for CONFIG_PROFILE_ALL_BRANCHES
Kbuild: change CC_OPTIMIZE_FOR_SIZE definition
kbuild: forbid kernel directory to contain spaces and colons
kbuild: adjust ksym_dep_filter for some cmd_* renames
kbuild: Fix dependencies for final vmlinux link
kbuild: better abstract vmlinux sequential prerequisites
kbuild: fix call to adjust_autoksyms.sh when output directory specified
kbuild: Get rid of KBUILD_STR
kbuild: rename cmd_as_s_S to cmd_cpp_s_S
kbuild: rename cmd_cc_i_c to cmd_cpp_i_c
kbuild: drop redundant "PHONY += FORCE"
kbuild: delete unnecessary "@:"
kbuild: mark help target as PHONY
...
25 May, 2016
2 commits
-
Pull asm-generic cleanup from Arnd Bergmann:
"I have only one patch for asm-generic in this release, this one is
from James Hogan and updates the generic system call table for
renameat2 so we don't need to provide both renameat and renameat2 in
newly added architectures"* tag 'asm-generic-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic:
asm-generic: Drop renameat syscall from default list -
Pull nios2 update from Ley Foon Tan:
- add order-only DTC dependency to %.dtb target
- fix libgcc location detection* tag 'nios2-v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
nios2: Add order-only DTC dependency to %.dtb target
nios2: Fix libgcc location detection
21 May, 2016
2 commits
-
The binary GCD algorithm is based on the following facts:
1. If a and b are all evens, then gcd(a,b) = 2 * gcd(a/2, b/2)
2. If a is even and b is odd, then gcd(a,b) = gcd(a/2, b)
3. If a and b are all odds, then gcd(a,b) = gcd((a-b)/2, b) = gcd((a+b)/2, b)Even on x86 machines with reasonable division hardware, the binary
algorithm runs about 25% faster (80% the execution time) than the
division-based Euclidian algorithm.On platforms like Alpha and ARMv6 where division is a function call to
emulation code, it's even more significant.There are two variants of the code here, depending on whether a fast
__ffs (find least significant set bit) instruction is available. This
allows the unpredictable branches in the bit-at-a-time shifting loop to
be eliminated.If fast __ffs is not available, the "even/odd" GCD variant is used.
I use the following code to benchmark:
#include
#include
#include
#include
#include
#include#define swap(a, b) \
do { \
a ^= b; \
b ^= a; \
a ^= b; \
} while (0)unsigned long gcd0(unsigned long a, unsigned long b)
{
unsigned long r;if (a < b) {
swap(a, b);
}if (b == 0)
return a;while ((r = a % b) != 0) {
a = b;
b = r;
}return b;
}unsigned long gcd1(unsigned long a, unsigned long b)
{
unsigned long r = a | b;if (!a || !b)
return r;b >>= __builtin_ctzl(b);
for (;;) {
a >>= __builtin_ctzl(a);
if (a == b)
return a << __builtin_ctzl(r);if (a < b)
swap(a, b);
a -= b;
}
}unsigned long gcd2(unsigned long a, unsigned long b)
{
unsigned long r = a | b;if (!a || !b)
return r;r &= -r;
while (!(b & r))
b >>= 1;for (;;) {
while (!(a & r))
a >>= 1;
if (a == b)
return a;if (a < b)
swap(a, b);
a -= b;
a >>= 1;
if (a & r)
a += b;
a >>= 1;
}
}unsigned long gcd3(unsigned long a, unsigned long b)
{
unsigned long r = a | b;if (!a || !b)
return r;b >>= __builtin_ctzl(b);
if (b == 1)
return r & -r;for (;;) {
a >>= __builtin_ctzl(a);
if (a == 1)
return r & -r;
if (a == b)
return a << __builtin_ctzl(r);if (a < b)
swap(a, b);
a -= b;
}
}unsigned long gcd4(unsigned long a, unsigned long b)
{
unsigned long r = a | b;if (!a || !b)
return r;r &= -r;
while (!(b & r))
b >>= 1;
if (b == r)
return r;for (;;) {
while (!(a & r))
a >>= 1;
if (a == r)
return r;
if (a == b)
return a;if (a < b)
swap(a, b);
a -= b;
a >>= 1;
if (a & r)
a += b;
a >>= 1;
}
}static unsigned long (*gcd_func[])(unsigned long a, unsigned long b) = {
gcd0, gcd1, gcd2, gcd3, gcd4,
};#define TEST_ENTRIES (sizeof(gcd_func) / sizeof(gcd_func[0]))
#if defined(__x86_64__)
#define rdtscll(val) do { \
unsigned long __a,__d; \
__asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \
(val) = ((unsigned long long)__a) | (((unsigned long long)__d)<= start)
ret = end - start;
else
ret = ~0ULL - start + 1 + end;*res = gcd_res;
return ret;
}#else
static inline struct timespec read_time(void)
{
struct timespec time;
clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &time);
return time;
}static inline unsigned long long diff_time(struct timespec start, struct timespec end)
{
struct timespec temp;if ((end.tv_nsec - start.tv_nsec) < 0) {
temp.tv_sec = end.tv_sec - start.tv_sec - 1;
temp.tv_nsec = 1000000000ULL + end.tv_nsec - start.tv_nsec;
} else {
temp.tv_sec = end.tv_sec - start.tv_sec;
temp.tv_nsec = end.tv_nsec - start.tv_nsec;
}return temp.tv_sec * 1000000000ULL + temp.tv_nsec;
}static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long),
unsigned long a, unsigned long b, unsigned long *res)
{
struct timespec start, end;
unsigned long gcd_res;start = read_time();
gcd_res = gcd(a, b);
end = read_time();*res = gcd_res;
return diff_time(start, end);
}#endif
static inline unsigned long get_rand()
{
if (sizeof(long) == 8)
return (unsigned long)rand() << 32 | rand();
else
return rand();
}int main(int argc, char **argv)
{
unsigned int seed = time(0);
int loops = 100;
int repeats = 1000;
unsigned long (*res)[TEST_ENTRIES];
unsigned long long elapsed[TEST_ENTRIES];
int i, j, k;for (;;) {
int opt = getopt(argc, argv, "n:r:s:");
/* End condition always first */
if (opt == -1)
break;switch (opt) {
case 'n':
loops = atoi(optarg);
break;
case 'r':
repeats = atoi(optarg);
break;
case 's':
seed = strtoul(optarg, NULL, 10);
break;
default:
/* You won't actually get here. */
break;
}
}res = malloc(sizeof(unsigned long) * TEST_ENTRIES * loops);
memset(elapsed, 0, sizeof(elapsed));srand(seed);
for (j = 0; j < loops; j++) {
unsigned long a = get_rand();
/* Do we have args? */
unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
unsigned long long min_elapsed[TEST_ENTRIES];
for (k = 0; k < repeats; k++) {
for (i = 0; i < TEST_ENTRIES; i++) {
unsigned long long tmp = benchmark_gcd_func(gcd_func[i], a, b, &res[j][i]);
if (k == 0 || min_elapsed[i] > tmp)
min_elapsed[i] = tmp;
}
}
for (i = 0; i < TEST_ENTRIES; i++)
elapsed[i] += min_elapsed[i];
}for (i = 0; i < TEST_ENTRIES; i++)
printf("gcd%d: elapsed %llu\n", i, elapsed[i]);k = 0;
srand(seed);
for (j = 0; j < loops; j++) {
unsigned long a = get_rand();
unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand();
for (i = 1; i < TEST_ENTRIES; i++) {
if (res[j][i] != res[j][0])
break;
}
if (i < TEST_ENTRIES) {
if (k == 0) {
k = 1;
fprintf(stderr, "Error:\n");
}
fprintf(stderr, "gcd(%lu, %lu): ", a, b);
for (i = 0; i < TEST_ENTRIES; i++)
fprintf(stderr, "%ld%s", res[j][i], i < TEST_ENTRIES - 1 ? ", " : "\n");
}
}if (k == 0)
fprintf(stderr, "PASS\n");free(res);
return 0;
}Compiled with "-O2", on "VirtualBox 4.4.0-22-generic #38-Ubuntu x86_64" got:
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 10174
gcd1: elapsed 2120
gcd2: elapsed 2902
gcd3: elapsed 2039
gcd4: elapsed 2812
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9309
gcd1: elapsed 2280
gcd2: elapsed 2822
gcd3: elapsed 2217
gcd4: elapsed 2710
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9589
gcd1: elapsed 2098
gcd2: elapsed 2815
gcd3: elapsed 2030
gcd4: elapsed 2718
PASS
zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10
gcd0: elapsed 9914
gcd1: elapsed 2309
gcd2: elapsed 2779
gcd3: elapsed 2228
gcd4: elapsed 2709
PASS[akpm@linux-foundation.org: avoid #defining a CONFIG_ variable]
Signed-off-by: Zhaoxiu Zeng
Signed-off-by: George Spelvin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Define HAVE_EXIT_THREAD for archs which want to do something in
exit_thread. For others, let's define exit_thread as an empty inline.This is a cleanup before we change the prototype of exit_thread to
accept a task parameter.[akpm@linux-foundation.org: fix mips]
Signed-off-by: Jiri Slaby
Cc: "David S. Miller"
Cc: "H. Peter Anvin"
Cc: "James E.J. Bottomley"
Cc: Aurelien Jacquiot
Cc: Benjamin Herrenschmidt
Cc: Catalin Marinas
Cc: Chen Liqin
Cc: Chris Metcalf
Cc: Chris Zankel
Cc: David Howells
Cc: Fenghua Yu
Cc: Geert Uytterhoeven
Cc: Guan Xuetao
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Heiko Carstens
Cc: Helge Deller
Cc: Ingo Molnar
Cc: Ivan Kokshaysky
Cc: James Hogan
Cc: Jeff Dike
Cc: Jesper Nilsson
Cc: Jiri Slaby
Cc: Jonas Bonn
Cc: Koichi Yasutake
Cc: Lennox Wu
Cc: Ley Foon Tan
Cc: Mark Salter
Cc: Martin Schwidefsky
Cc: Matt Turner
Cc: Max Filippov
Cc: Michael Ellerman
Cc: Michal Simek
Cc: Mikael Starvik
Cc: Paul Mackerras
Cc: Peter Zijlstra
Cc: Ralf Baechle
Cc: Rich Felker
Cc: Richard Henderson
Cc: Richard Kuo
Cc: Richard Weinberger
Cc: Russell King
Cc: Steven Miao
Cc: Thomas Gleixner
Cc: Tony Luck
Cc: Vineet Gupta
Cc: Will Deacon
Cc: Yoshinori Sato
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 May, 2016
1 commit
-
The dtc dependency is missing, thus dtc is not built before it's invoked,
resulting in the following problem:linux-2.6$ make 10m50_defconfig && make 10m50_devboard.dtb
[...]
scripts/kconfig/conf --silentoldconfig Kconfig
DTC arch/nios2/boot/10m50_devboard.dtb
/bin/sh: 1: ./scripts/dtc/dtc: not found
arch/nios2/boot/Makefile:52: recipe for target 'arch/nios2/boot/10m50_devboard.dtb' failed
make[1]: *** [arch/nios2/boot/10m50_devboard.dtb] Error 127
arch/nios2/Makefile:57: recipe for target '10m50_devboard.dtb' failed
make: *** [10m50_devboard.dtb] Error 2Signed-off-by: Marek Vasut
Cc: Ley Foon Tan
Cc: Romain Perier
Acked-by: Ley Foon Tan
18 May, 2016
1 commit
-
Pull GPIO updates from Linus Walleij:
"This is the bulk of GPIO changes for kernel cycle v4.7:Core infrastructural changes:
- Support for natively single-ended GPIO driver stages.
This means that if the hardware has registers to configure open
drain or open source configuration, we use that rather than (as we
did before) try to emulate it by switching the line to an input to
get high impedance.This is also documented throughly in Documentation/gpio/driver.txt
for those of you who did not understand one word of what I just
wrote.- Start to do away with the unnecessarily complex and unitelligible
ARCH_REQUIRE_GPIOLIB and ARCH_WANT_OPTIONAL_GPIOLIB, another
evolutional artifact from the time when the GPIO subsystem was
unmaintained.Archs can now just select GPIOLIB and be done with it, cleanups to
arches will trickle in for the next kernel. Some minor archs ACKed
the changes immediately so these are included in this pull request.- Advancing the use of the data pointer inside the GPIO device for
storing driver data by switching the PowerPC, Super-H Unicore and
a few other subarches or subsystem drivers in ALSA SoC, Input,
serial, SSB, staging etc to use it.- The initialization now reads the input/output state of the GPIO
lines, so that each GPIO descriptor knows - if this callback is
implemented - whether the line is input or output. This also
reflects nicely in userspace "lsgpio".- It is now possible to name GPIO producer names, line names, from
the device tree. (Platform data has been supported for a while).
I bet we will get a similar mechanism for ACPI one of those days.
This makes is possible to get sensible producer names for e.g.
GPIO rails in "lsgpio" in userspace.New drivers:
- New driver for the Loongson1.
- The XLP driver now supports Broadcom Vulcan ARM64.
- The IT87 driver now supports IT8620 and IT8628.
- The PCA953X driver now supports Galileo Gen2.
Driver improvements:
- MCP23S08 was switched to use the gpiolib irqchip helpers and now
also suppors level-triggered interrupts.- 74x164 and RCAR now supports the .set_multiple() callback
- AMDPT was converted to use generic GPIO.
- TC3589x, TPS65218, SX150X, F7188X, MENZ127, VX855, WM831X, WM8994
support the new single ended callback for open drain and in some
cases open source.- Implement the .get_direction() callback for a few more drivers like
PL061, Xgene.Cleanups:
- Paul Gortmaker combed through the drivers and de-modularized those
who are not really modules.- Move the GPIO poweroff DT bindings to the power subdir where they
belong.- Rename gpio-generic.c to gpio-mmio.c, which is much more to the
point. That's what it is handling, nothing more, nothing less"* tag 'gpio-v4.7-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (126 commits)
MIPS: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB
gpio: zevio: make it explicitly non-modular
gpio: timberdale: make it explicitly non-modular
gpio: stmpe: make it explicitly non-modular
gpio: sodaville: make it explicitly non-modular
pinctrl: sh-pfc: Let gpio_chip.to_irq() return zero on error
gpio: dwapb: Add ACPI device ID for DWAPB GPIO controller on X-Gene platforms
gpio: dt-bindings: add wd,mbl-gpio bindings
gpio: of: make it possible to name GPIO lines
gpio: make gpiod_to_irq() return negative for NO_IRQ
gpio: xgene: implement .get_direction()
gpio: xgene: Enable ACPI support for X-Gene GFC GPIO driver
gpio: tegra: Implement gpio_get_direction callback
gpio: set up initial state from .get_direction()
gpio: rename gpio-generic.c into gpio-mmio.c
gpio: generic: fix GPIO_GENERIC_PLATFORM is set to module case
gpio: dwapb: add gpio-signaled acpi event support
gpio: dwapb: convert device node to fwnode
gpio: dwapb: remove name from dwapb_port_property
gpio/qoriq: select IRQ_DOMAIN
...
17 May, 2016
2 commits
-
The extra CFLAGS required for correct operation of the toolchain are not
propagated into the libgcc detection code. In case of the compiler from
poky sdk, these extra CFLAGS contain the location of compiler sysroot
(the --sysroot= option) and without this option, the location of libgcc
is not properly reported. Add the missing CFLAGS to address this issue.Signed-off-by: Marek Vasut
Cc: Ley Foon Tan
Cc: Romain Perier
Acked-by: Romain Perier
Acked-by: Ley Foon Tan -
Pull arm64 updates from Will Deacon:
- virt_to_page/page_address optimisations
- support for NUMA systems described using device-tree
- support for hibernate/suspend-to-disk
- proper support for maxcpus= command line parameter
- detection and graceful handling of AArch64-only CPUs
- miscellaneous cleanups and non-critical fixes
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (92 commits)
arm64: do not enforce strict 16 byte alignment to stack pointer
arm64: kernel: Fix incorrect brk randomization
arm64: cpuinfo: Missing NULL terminator in compat_hwcap_str
arm64: secondary_start_kernel: Remove unnecessary barrier
arm64: Ensure pmd_present() returns false after pmd_mknotpresent()
arm64: Replace hard-coded values in the pmd/pud_bad() macros
arm64: Implement pmdp_set_access_flags() for hardware AF/DBM
arm64: Fix typo in the pmdp_huge_get_and_clear() definition
arm64: mm: remove unnecessary EXPORT_SYMBOL_GPL
arm64: always use STRICT_MM_TYPECHECKS
arm64: kvm: Fix kvm teardown for systems using the extended idmap
arm64: kaslr: increase randomization granularity
arm64: kconfig: drop CONFIG_RTC_LIB dependency
arm64: make ARCH_SUPPORTS_DEBUG_PAGEALLOC depend on !HIBERNATION
arm64: hibernate: Refuse to hibernate if the boot cpu is offline
arm64: kernel: Add support for hibernate/suspend-to-disk
PM / Hibernate: Call flush_icache_range() on pages restored in-place
arm64: Add new asm macro copy_page
arm64: Promote KERNEL_START/KERNEL_END definitions to a header file
arm64: kernel: Include _AC definition in page.h
...
05 May, 2016
1 commit
-
The newer renameat2 syscall provides all the functionality provided by
the renameat syscall and adds flags, so future architectures won't need
to include renameat.Therefore drop the renameat syscall from the generic syscall list unless
__ARCH_WANT_RENAMEAT is defined by the architecture's unistd.h prior to
including asm-generic/unistd.h, and adjust all architectures using the
generic syscall list to define it so that no in-tree architectures are
affected.Signed-off-by: James Hogan
Acked-by: Vineet Gupta
Cc: linux-arch@vger.kernel.org
Cc: linux-snps-arc@lists.infradead.org
Cc: Catalin Marinas
Cc: Will Deacon
Cc: linux-arm-kernel@lists.infradead.org
Cc: Mark Salter
Cc: Aurelien Jacquiot
Cc: linux-c6x-dev@linux-c6x.org
Cc: Richard Kuo
Cc: linux-hexagon@vger.kernel.org
Cc: linux-metag@vger.kernel.org
Cc: Jonas Bonn
Cc: linux@lists.openrisc.net
Cc: Chen Liqin
Cc: Lennox Wu
Cc: Chris Metcalf
Cc: Guan Xuetao
Cc: Ley Foon Tan
Cc: nios2-dev@lists.rocketboards.org
Cc: Yoshinori Sato
Cc: uclinux-h8-devel@lists.sourceforge.jp
Signed-off-by: Arnd Bergmann
27 Apr, 2016
1 commit
-
Depending on the size of the area to be memset'ed, the nios2 memset implementation
either uses a naive loop (for buffers smaller or equal than 8 bytes) or a more optimized
implementation (for buffers larger than 8 bytes). This implementation does 4-byte stores
rather than 1-byte stores to speed up memset.However, we discovered that on our nios2 platform, memset() was not properly setting the
buffer to the expected value. A memset of 0xff would not set the entire buffer to 0xff, but to:0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 ...
Which is obviously incorrect. Our investigation has revealed that the problem lies in the
incorrect constraints used in the inline assembly.The following piece of assembly, from the nios2 memset implementation, is supposed to
create a 4-byte value that repeats 4 times the 1-byte pattern passed as memset argument:/* fill8 %3, %5 (c & 0xff) */
" slli %4, %5, 8\n"
" or %4, %4, %5\n"
" slli %3, %4, 16\n"
" or %3, %3, %4\n"However, depending on the compiler and optimization level, this code might be compiled as:
34: 280a923a slli r5,r5,8
38: 294ab03a or r5,r5,r5
3c: 2808943a slli r4,r5,16
40: 2148b03a or r4,r4,r5This is wrong because r5 gets used both for %5 and %4, which leads to the final pattern
stored in r4 to be 0xff00ff00 rather than the expected 0xffffffff.%4 is defined with the "=r" constraint, i.e as an output operand. However, as explained in
http://www.ethernut.de/en/documents/arm-inline-asm.html, this does not prevent gcc from
using the same register for an output operand (%4) and input operand (%5). By using the
constraint modifier '&', we indicate that the register should be used for output only. With this
change, we get the following assembly output:34: 2810923a slli r8,r5,8
38: 4150b03a or r8,r8,r5
3c: 400e943a slli r7,r8,16
40: 3a0eb03a or r7,r7,r8Which correctly produces the 0xffffffff pattern when 0xff is passed as the memset() pattern.
It is worth mentioning the observed consequence of this bug: we were hitting the kernel
BUG() in mm/bootmem.c:__free() that verifies when marking a page as free that it was
previously marked as occupied (i.e that the bit was set to 1). The entire bootmem bitmap is
set to 0xff bit via a memset() during the bootmem initialization. The bootmem_free() call right
after the initialization was finding some bits to be set to 0, which didn't make sense since the
bitmap has just been memset'ed to 0xff. Except that due to the bug explained above, the
bitmap was in fact initialized to 0xff00ff00.Thanks to Marek Vasut for his help and feedback.
Signed-off-by: Romain Perier
Acked-by: Marek Vasut
Acked-by: Ley Foon Tan
26 Apr, 2016
1 commit
-
This symbols is not needed to get access to selecting the
GPIOLIB anymore: any arch can select GPIOLIB.Cc: Michael Büsch
Cc: nios2-dev@lists.rocketboards.org
Acked-by: Ley Foon Tan
Signed-off-by: Linus Walleij
22 Apr, 2016
1 commit
-
To align with other architectures, the expression produced by expanding
the macro page_to_virt() should be of type void*, since it returns a
virtual address. Fix that, and also fix up an instance where page_to_virt
was expected to return 'unsigned long', and drop another instance that was
entirely unused (page_to_bus)Acked-by: Andrew Morton
Signed-off-by: Ard Biesheuvel
Signed-off-by: Will Deacon
20 Apr, 2016
1 commit
-
Since commit 2aedcd098a94 ('kbuild: suppress annoying "... is up to
date." message'), $(call if_changed,...) is evaluated to "@:"
when there is nothing to do.We no longer need to add "@:" after $(call if_changed,...) to
suppress "... is up to date." message.Signed-off-by: Masahiro Yamada
Signed-off-by: Michal Marek
31 Mar, 2016
1 commit
-
nios2 builds fail with the following build error.
arch/nios2/kernel/prom.c: In function 'early_init_dt_scan_serial':
arch/nios2/kernel/prom.c:100:2: error:
implicit declaration of function 'fdt_translate_address'Commit c90fe9c0394b ("of: earlycon: Move address translation to
of_setup_earlycon()") replaced fdt_translate_address() with
of_flat_dt_translate_address() but missed updating the nios2 code.Fixes: c90fe9c0394b ("of: earlycon: Move address translation to of_setup_earlycon()")
Cc: Peter Hurley
Cc: Rob Herring
Signed-off-by: Guenter Roeck
Acked-by: Ley Foon Tan
26 Mar, 2016
1 commit
-
KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.Move the definition of __irq_entry to so that the
users don't need to pull in . Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.Signed-off-by: Alexander Potapenko
Acked-by: Steven Rostedt
Cc: Christoph Lameter
Cc: Pekka Enberg
Cc: David Rientjes
Cc: Joonsoo Kim
Cc: Andrey Konovalov
Cc: Dmitry Vyukov
Cc: Andrey Ryabinin
Cc: Konstantin Serebryany
Cc: Dmitry Chernenkov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
14 Mar, 2016
1 commit
-
This patch updates all instances of csum_tcpudp_magic and
csum_tcpudp_nofold to reflect the types that are usually used as the source
inputs. For example the protocol field is populated based on nexthdr which
is actually an unsigned 8 bit value. The length is usually populated based
on skb->len which is an unsigned integer.This addresses an issue in which the IPv6 function csum_ipv6_magic was
generating a checksum using the full 32b of skb->len while
csum_tcpudp_magic was only using the lower 16 bits. As a result we could
run into issues when attempting to adjust the checksum as there was no
protocol agnostic way to update it.With this change the value is still truncated as many architectures use
"(len + proto) << 8", however this truncation only occurs for values
greater than 16776960 in length and as such is unlikely to occur as we stop
the inner headers at ~64K in size.I did have to make a few minor changes in the arm, mn10300, nios2, and
score versions of the function in order to support these changes as they
were either using things such as an OR to combine the protocol and length,
or were using ntohs to convert the length which would have truncated the
value.I also updated a few spots in terms of whitespace and type differences for
the addresses. Most of this was just to make sure all of the definitions
were in sync going forward.Signed-off-by: Alexander Duyck
Signed-off-by: David S. Miller
21 Jan, 2016
2 commits
-
Move the generic implementation to now that all
architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now
that everyone supports them.[valentinrothberg@gmail.com: remove leftovers in Kconfig]
Signed-off-by: Christoph Hellwig
Cc: "David S. Miller"
Cc: Aurelien Jacquiot
Cc: Chris Metcalf
Cc: David Howells
Cc: Geert Uytterhoeven
Cc: Haavard Skinnemoen
Cc: Hans-Christian Egtvedt
Cc: Helge Deller
Cc: James Hogan
Cc: Jesper Nilsson
Cc: Koichi Yasutake
Cc: Ley Foon Tan
Cc: Mark Salter
Cc: Mikael Starvik
Cc: Steven Miao
Cc: Vineet Gupta
Cc: Christian Borntraeger
Cc: Joerg Roedel
Cc: Sebastian Ott
Signed-off-by: Valentin Rothberg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Christoph Hellwig
Cc: Ley Foon Tan
Cc: Christian Borntraeger
Cc: Joerg Roedel
Cc: Sebastian Ott
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Nov, 2015
1 commit
-
There is intermittent cache coherency issue caught in toolchian tests.
Revert to use flushd.Signed-off-by: Ley Foon Tan
10 Nov, 2015
1 commit
-
Pull nios2 updates from Ley Foon Tan:
- nios2: Remove unnecessary #ifdef guards
- nios2: Switch to generic __xchg()
- nios2: Fix unused variable warning* tag 'nios2-v4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/lftan/nios2:
nios2: Remove unnecessary #ifdef guards
nios2: Switch to generic __xchg()
nios2: Fix unused variable warning
09 Nov, 2015
2 commits
-
__HAVE_ARCH_MEMMOVE and __HAVE_ARCH_MEMSET are unconditionally defined
for nios2, so there is no need to protect the function definitions of
memmove() and memset().Signed-off-by: Tobias Klauser
Acked-by: Ley Foon Tan -
The generic __xchg() implementation present in asm-generic/cmpxchg.h is
correct on nios2 and even generates the same code. Switch to this generic
implementation to trim down the amount of ad-hoc copies of the code.Signed-off-by: Marek Vasut
Acked-by: Ley Foon Tan
