15 Aug, 2010
2 commits
-
Following sample Kconfig generated a segfault:
config FOO
bool
select PERF_EVENTS if HAVE_HW_BREAKPOINTconfig PERF_EVENTS
boolconfig HAVE_HW_BREAKPOINT
bool
depends on PERF_EVENTSFix by reverting back to a valid property if there was no
property on the stack of symbols.The above pattern were seen in sh Kconfig.
A fix for the Kconfig file has been sent to the sh folks.Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek -
savedefconfig failed to save the correct minimal config
when it encountered a choice marked optional.Consider following minimal configuration:
$cat Kconfig
choice
prompt "choice"
optionalconfig A
bool "a"config B
bool "b"endchoice
$cat .config | grep -v ^#
CONFIG_A=y$conf --savedefconfig=defconfig Kconfig
would before this fix result in an empty file, because
kconfig would assume that CONFIG_A=y is a default value.
But because the choice is optional the default is that
both A and B are =n.Fix so we handle optional choices correct.
Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek
13 Aug, 2010
3 commits
-
This fix facilitates fgets() either it returns on success or on error or
when end of file occurs.Signed-off-by: Jean Sacren
Signed-off-by: Michal Marek -
This fix facilitates fwrite() in both confdata.c and expr.c, either it
succeeds in writing, or an error occurs, or the end of file is reached.Signed-off-by: Jean Sacren
Signed-off-by: Michal Marek -
nconf crush with segfault if press right arrow in empty menu.
Signed-off-by: Andrej Gelenberg
Signed-off-by: Michal Marek
12 Aug, 2010
2 commits
-
If a minimal config did not specify the value
of all choice values, the resulting configuration
could have wrong values.Consider following example:
config M
def_bool y
option modules
choice
prompt "choice list"
config A
tristate "a"
config B
tristate "b"
endchoiceWith a defconfig like this:
CONFIG_M=y
CONFIG_A=yThe resulting configuration would have
CONFIG_A=m
which was unexpected.
The problem was not not all choice values were set and thus
kconfig calculated a wrong value.The fix is to set all choice values when we
read a defconfig files.conf_set_all_new_symbols() is refactored such that
random choice values are now handled by a dedicated function.
And new choice values are set by set_all_choice_values().This was not the minimal fix, but the fix that resulted
in the most readable code.Signed-off-by: Sam Ravnborg
Reported-by: Arve Hjønnevåg
Tested-by: Arve Hjønnevåg
Signed-off-by: Michal Marek -
savedefconfig failed to save choice symbols equal to 'y'
for tristate choices.
This resulted in this value being lost.In particular is fixes an issue where
make ARCH=avr32 atngw100_defconfig
make ARCH=avr32 savedefconfig
cp defconfig arch/avr32/configs/atngw100_defconfig
make ARCH=avr32 atngw100_defconfig
diff -u .config .config.oldfailed to produce an identical .config.
Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek
04 Aug, 2010
1 commit
-
Conflicts:
scripts/kconfig/Makefile
03 Aug, 2010
9 commits
-
savedefconfig will save a minimal config to a file
named "defconfig".The config symbols are saved in the same order as
they appear in the menu structure so it should
be possible to map them to the relevant menus
if desired.The implementation was tested against several minimal
configs for arm which was created using brute-force.There was one regression related to default numbers
which had their valid range further limited by another symbol.Sample:
config FOO
int "foo"
default 4config BAR
int "bar"
range 0 FOOIf FOO is set to 3 then BAR cannot take a value higher than 3.
But the current implementation will set BAR equal to 4.This is seldomly used and the final configuration is OK,
and the fix was non-trivial.
So it was documented in the code and left as is.Signed-off-by: Sam Ravnborg
Acked-by: Uwe Kleine-König
Signed-off-by: Michal Marek -
Add a a few local functions to avoid some code duplication
No functional changes.Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek -
Move logic to determine default for a choice to
a separate function.
No functional changes.Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek -
alldefconfig create a configuration with all values set
to their default value (form the Kconfig files).This may be useful when we try to use more sensible default
values and may also be used in combination with
the minimal defconfigs.Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek -
Consider following kconfig file:
config TEST1
bool "test 1"
depends on TEST2config TEST2
bool "test 2"
depends on TEST1Previously kconfig would report:
foo:6:error: found recursive dependency: TEST2 -> TEST1 -> TEST2
With the following patch kconfig reports:
foo:5:error: recursive dependency detected!
foo:5: symbol TEST2 depends on TEST1
foo:1: symbol TEST1 depends on TEST2Note that we now report where the offending symbols are defined.
This can be a great help for complex situations involving
several files.Patch is originally from Roman Zippel with a few adjustments by Sam.
Signed-off-by: Sam Ravnborg
Cc: Roman Zippel
Signed-off-by: Michal Marek -
When we add a new config symbol save the file/line
so we later can refer to their location.The information is saved as a property to a config symbol
because we may have multiple definitions of the same symbol.This has the side-effect that a symbol always has
at least one property.Signed-off-by: Sam Ravnborg
Cc: Roman Zippel
Signed-off-by: Michal Marek -
Rename to a name that better match the other kconfig targets.
listnewconfig shall read as:
- list new options compared to current configuration
New options are now written to stdout so one can redirect the output.
Do not exit with an error code if there is new options.
These are feature changes compared to the original
nonint_oldconfig - but as this feature has not yet been in a
released kernel it should not matter.It is still possible to do:
make listnewconfig
lookup new config options in Kconfig*
edit .configSigned-off-by: Sam Ravnborg
Cc: Aristeu Rozanski
Acked-by: Aristeu Rozanski
Signed-off-by: Michal Marek -
Rename target to something that fall more in line
with the other kconfig targets.oldnoconfig shall read as:
- read the old configuration and set all new options to no
Signed-off-by: Sam Ravnborg
Cc: Aristeu Rozanski
Signed-off-by: Michal Marek -
The list of options supported by conf is growing
and their abbreviation did not resemble anything usefull.So drop the single letter options in favour of long options.
The long options are named equal to what we know from
the make target.
The internal implmentation was changed to match this,
resulting in much more readable code.Support for short options is dropped - no one is supposed
to call this program direct anyway.Signed-off-by: Sam Ravnborg
Signed-off-by: Michal Marek
02 Aug, 2010
2 commits
-
nfs_commit_inode() needs to be defined irrespectively of whether or not
we are supporting NFSv3 and NFSv4.Allow the compiler to optimise away code in the NFSv2-only case by
converting it into an inlined stub function.Reported-and-tested-by: Ingo Molnar
Signed-off-by: Trond Myklebust
Signed-off-by: Linus Torvalds
31 Jul, 2010
13 commits
-
* master.kernel.org:/home/rmk/linux-2.6-arm:
cyber2000fb: fix console in truecolor modes
cyber2000fb: fix machine hang on module load
SA1111: Eliminate use after free
ARM: Fix Versatile/Realview/VExpress MMC card detection sense
ARM: 6279/1: highmem: fix SMP preemption bug in kmap_high_l1_vipt
ARM: Add barriers to io{read,write}{8,16,32} accessors as well
ARM: 6273/1: Add barriers to the I/O accessors if ARM_DMA_MEM_BUFFERABLE
ARM: 6272/1: Convert L2x0 to use the IO relaxed operations
ARM: 6271/1: Introduce *_relaxed() I/O accessors
ARM: 6275/1: ux500: don't use writeb() in uncompress.h
ARM: 6270/1: clean files in arch/arm/boot/compressed/
ARM: Fix csum_partial_copy_from_user() -
* 'bugfixes' of git://git.linux-nfs.org/projects/trondmy/nfs-2.6:
NFS: Ensure that writepage respects the nonblock flag
NFS: kswapd must not block in nfs_release_page
nfs: include space for the NUL in root path -
* 'drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6:
drm/edid: Fix the HDTV hack sync adjustment
drm/radeon/kms: fix radeon mid power profile reporting -
Debian's ia64 autobuilders have been seeing kernel freeze or reboot
when running the gdb testsuite (Debian bug 588574): dannf bisected to
2.6.32 62eede62dafb4a6633eae7ffbeb34c60dba5e7b1 "mm: ZERO_PAGE without
PTE_SPECIAL"; and reproduced it with gdb's gcore on a simple target.I'd missed updating the gate_vma handling in __get_user_pages(): that
happens to use vm_normal_page() (nowadays failing on the zero page),
yet reported success even when it failed to get a page - boom when
access_process_vm() tried to copy that to its intermediate buffer.Fix this, resisting cleanups: in particular, leave it for now reporting
success when not asked to get any pages - very probably safe to change,
but let's not risk it without testing exposure.Why did ia64 crash with 16kB pages, but succeed with 64kB pages?
Because setup_gate() pads each 64kB of its gate area with zero pages.Reported-by: Andreas Barth
Bisected-by: dann frazier
Signed-off-by: Hugh Dickins
Tested-by: dann frazier
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds -
Remove the __exit mark from cifs_exit_dns_resolver() as it's called by the
module init routine in case of error, and so may have been discarded during
linkage.Signed-off-by: David Howells
Acked-by: Jeff Layton
Signed-off-by: Linus Torvalds -
Return value was not set to 0 in setcolreg() with truecolor modes. This causes
fb_set_cmap() to abort after first color, resulting in blank palette - and
blank console in 24bpp and 32bpp modes.Signed-off-by: Ondrej Zary
Signed-off-by: Russell King -
I was testing two CyberPro 2000 based PCI cards on x86 and the machine always
hanged completely when the cyber2000fb module was loaded. It seems that the
card hangs when some registers are accessed too quickly after writing RAMDAC
control register. With this patch, both card work.Add delay after RAMDAC control register write to prevent hangs on module load.
Signed-off-by: Ondrej Zary
Signed-off-by: Russell King -
__sa1111_remove always frees its argument, so the subsequent reference to
sachip->saved_state represents a use after free. __sa1111_remove does not
appear to use the saved_state field, so the patch simply frees it first.A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)//
@@
expression E,E2;
@@__sa1111_remove(E)
...
(
E = E2
|
* E
)
//Signed-off-by: Julia Lawall
Signed-off-by: Russell King -
The MMC card detection sense has become really confused with negations
at various levels, leading to some platforms not detecting inserted
cards. Fix this by converting everything to positive logic throughout,
thereby getting rid of these negations.Signed-off-by: Russell King
-
smp_processor_id() must not be called from a preemptible context (this
is checked by CONFIG_DEBUG_PREEMPT). kmap_high_l1_vipt() was doing so.
This lead to a problem where the wrong per_cpu kmap_high_l1_vipt_depth
could be incremented, causing a BUG_ON(*depthSigned-off-by: Gary King
Acked-by: Nicolas Pitre
Signed-off-by: Russell King -
Signed-off-by: Trond Myklebust
-
See https://bugzilla.kernel.org/show_bug.cgi?id=16056
If other processes are blocked waiting for kswapd to free up some memory so
that they can make progress, then we cannot allow kswapd to block on those
processes.Signed-off-by: Trond Myklebust
Cc: stable@kernel.org -
In root_nfs_name() it does the following:
if (strlen(buf) + strlen(cp) > NFS_MAXPATHLEN) {
printk(KERN_ERR "Root-NFS: Pathname for remote directory too long.\n");
return -1;
}
sprintf(nfs_export_path, buf, cp);In the original code if (strlen(buf) + strlen(cp) == NFS_MAXPATHLEN)
then the sprintf() would lead to an overflow. Generally the rest of the
code assumes that the path can have NFS_MAXPATHLEN (1024) characters and
a NUL terminator so the fix is to add space to the nfs_export_path[]
buffer.Signed-off-by: Dan Carpenter
Signed-off-by: Trond Myklebust
30 Jul, 2010
6 commits
-
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] etr: fix clock synchronization race
[S390] Fix IRQ tracing in case of PER -
* git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog:
watchdog: update MAINTAINERS entry -
* 'fix/hda' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6:
ALSA: hda - Add a PC-beep workaround for ASUS P5-V
ALSA: hda - Assume PC-beep as default for Realtek
ALSA: hda - Don't register beep input device when no beep is available
ALSA: hda - Fix pin-detection of Nvidia HDMI -
Fix __task_cred()'s lockdep check by removing the following validation
condition:lockdep_tasklist_lock_is_held()
as commit_creds() does not take the tasklist_lock, and nor do most of the
functions that call it, so this check is pointless and it can prevent
detection of the RCU lock not being held if the tasklist_lock is held.Instead, add the following validation condition:
task->exit_state >= 0
to permit the access if the target task is dead and therefore unable to change
its own credentials.Fix __task_cred()'s comment to:
(1) discard the bit that says that the caller must prevent the target task
from being deleted. That shouldn't need saying.(2) Add a comment indicating the result of __task_cred() should not be passed
directly to get_cred(), but rather than get_task_cred() should be used
instead.Also put a note into the documentation to enforce this point there too.
Signed-off-by: David Howells
Acked-by: Jiri Olsa
Cc: Paul E. McKenney
Signed-off-by: Linus Torvalds -
It's possible for get_task_cred() as it currently stands to 'corrupt' a set of
credentials by incrementing their usage count after their replacement by the
task being accessed.What happens is that get_task_cred() can race with commit_creds():
TASK_1 TASK_2 RCU_CLEANER
-->get_task_cred(TASK_2)
rcu_read_lock()
__cred = __task_cred(TASK_2)
-->commit_creds()
old_cred = TASK_2->real_cred
TASK_2->real_cred = ...
put_cred(old_cred)
call_rcu(old_cred)
[__cred->usage == 0]
get_cred(__cred)
[__cred->usage == 1]
rcu_read_unlock()
-->put_cred_rcu()
[__cred->usage == 1]
panic()However, since a tasks credentials are generally not changed very often, we can
reasonably make use of a loop involving reading the creds pointer and using
atomic_inc_not_zero() to attempt to increment it if it hasn't already hit zero.If successful, we can safely return the credentials in the knowledge that, even
if the task we're accessing has released them, they haven't gone to the RCU
cleanup code.We then change task_state() in procfs to use get_task_cred() rather than
calling get_cred() on the result of __task_cred(), as that suffers from the
same problem.Without this change, a BUG_ON in __put_cred() or in put_cred_rcu() can be
tripped when it is noticed that the usage count is not zero as it ought to be,
for example:kernel BUG at kernel/cred.c:168!
invalid opcode: 0000 [#1] SMP
last sysfs file: /sys/kernel/mm/ksm/run
CPU 0
Pid: 2436, comm: master Not tainted 2.6.33.3-85.fc13.x86_64 #1 0HR330/OptiPlex
745
RIP: 0010:[] [] __put_cred+0xc/0x45
RSP: 0018:ffff88019e7e9eb8 EFLAGS: 00010202
RAX: 0000000000000001 RBX: ffff880161514480 RCX: 00000000ffffffff
RDX: 00000000ffffffff RSI: ffff880140c690c0 RDI: ffff880140c690c0
RBP: ffff88019e7e9eb8 R08: 00000000000000d0 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000040 R12: ffff880140c690c0
R13: ffff88019e77aea0 R14: 00007fff336b0a5c R15: 0000000000000001
FS: 00007f12f50d97c0(0000) GS:ffff880007400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8f461bc000 CR3: 00000001b26ce000 CR4: 00000000000006f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process master (pid: 2436, threadinfo ffff88019e7e8000, task ffff88019e77aea0)
Stack:
ffff88019e7e9ec8 ffffffff810698cd ffff88019e7e9ef8 ffffffff81069b45
ffff880161514180 ffff880161514480 ffff880161514180 0000000000000000
ffff88019e7e9f28 ffffffff8106aace 0000000000000001 0000000000000246
Call Trace:
[] put_cred+0x13/0x15
[] commit_creds+0x16b/0x175
[] set_current_groups+0x47/0x4e
[] sys_setgroups+0xf6/0x105
[] system_call_fastpath+0x16/0x1b
Code: 48 8d 71 ff e8 7e 4e 15 00 85 c0 78 0b 8b 75 ec 48 89 df e8 ef 4a 15 00
48 83 c4 18 5b c9 c3 55 8b 07 8b 07 48 89 e5 85 c0 74 04 0b eb fe 65 48 8b
04 25 00 cc 00 00 48 3b b8 58 04 00 00 75
RIP [] __put_cred+0xc/0x45
RSP
---[ end trace df391256a100ebdd ]---Signed-off-by: David Howells
Acked-by: Jiri Olsa
Signed-off-by: Linus Torvalds -
Add Mailing-list and website to watchdog MAINTAINERS entry.
Signed-off-by: Wim Van Sebroeck
29 Jul, 2010
2 commits
-
There seems to be a kconfig bug due to MODULES not always being
evaluated if no .config is found. Take the following Kconfig as an
example:config MODULES
def_bool yconfig FOO
def_tristate mWith no .config, the following configuration is generated:
CONFIG_MODULES=y
CONFIG_FOO=yWith an empty .config, the following:
CONFIG_MODULES=y
CONFIG_FOO=mTristate choice statements can also exhibit the problem, due to having an
implicit rev_dep (select) containing "m".The problem is that MODULES is never evaluted in conf_read_simple() unless
there's a .config. The following patch fixes this.Signed-off-by: Ulf Magnusson
Reviewed-by: WANG Cong
Signed-off-by: Michal Marek -
ASUS P5-V provides a SSID that unexpectedly matches with the value
compilant with Realtek's specification. Thus the driver interprets
it badly, resulting in non-working PC beep.This patch adds a white-list for such a case; a white-list of known
devices with working PC beep.Signed-off-by: Takashi Iwai
