07 Mar, 2010
40 commits
-
The C99 specification states in section 6.11.5:
The placement of a storage-class specifier other than at the beginning of
the declaration specifiers in a declaration is an obsolescent feature.Signed-off-by: Tobias Klauser
Signed-off-by: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Memset should be given the size of the structure, not the size of the
pointer.The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)//
@@
type T;
T *x;
expression E;
@@memset(x, E, sizeof(
+ *
x))
//Signed-off-by: Julia Lawall
Signed-off-by: Alessandro Zummo
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The function pcf2123_remove is used only wrapped by __devexit_p so define
it using __devexit.Signed-off-by: Uwe Kleine-König
Signed-off-by: Alessandro Zummo
Cc: Christian Pellegrin
Cc: Chris Verges
Cc: Paul Gortmaker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix issue with rtc device not getting unregistered in probe error path.
Use the devres managed resource functions in the probe routine to cleanup
the error path.Use sysfs_{create/remove}_group to add/remove the sysfs files.
Reduces the text size by 132 bytes, increases data by 12 bytes:
text data bss dec hex filename
- 937 124 0 1061 425 rtc-ep93xx.o
+ 805 136 0 941 3ad rtc-ep93xx.oSigned-off-by: H Hartley Sweeten
Acked-by: Alessandro Zummo
Cc: Paul Gortmaker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Free pdata before exit. Found by cppcheck.
[yuasa@linux-mips.org: add missing iounmap()]
Signed-off-by: Alexander Beregalov
Reviewed-by: WANG Cong
Acked-by: Daniel Mack
Acked-by: Alessandro Zummo
Cc Yoichi Yuasa
Cc: Paul Gortmaker
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently the xen support drivers are displayed in the main Device Drivers
menu of the config tools instead of in their own sub-menu, so move them to
their own sub-menu, like the rest of the driver world uses.This keeps the main Device Drivers menu from becoming messy.
Signed-off-by: Randy Dunlap
Cc: Jeremy Fitzhardinge
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
warning: symbol 'vgacon_text_mode_force' was not declared. Should it be static?
Signed-off-by: Thiago Farina
Acked-by: Matthew Garrett
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
BuraphaLinux reported that we will trigger a mm warning when we
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=65536, this is because mm cann't
allocate so many pages. We should limit the range of
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE, don't give a user any chance to
trigger that.Reported-by: BuraphaLinux Server
Tested-by: BuraphaLinux Server
Signed-off-by: WANG Cong
Cc: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Modify uid check in do_coredump so as to not apply it in the case of
pipes.This just got noticed in testing. The end of do_coredump validates the
uid of the inode for the created file against the uid of the crashing
process to ensure that no one can pre-create a core file with different
ownership and grab the information contained in the core when they
shouldn' tbe able to. This causes failures when using pipes for a core
dumps if the crashing process is not root, which is the uid of the pipe
when it is created.The fix is simple. Since the check for matching uid's isn't relevant for
pipes (a process can't create a pipe that the uermodehelper code will open
anyway), we can just just skip it in the event ispipe is non-zeroReverts a pipe-affecting change which was accidentally made in
: commit c46f739dd39db3b07ab5deb4e3ec81e1c04a91af
: Author: Ingo Molnar
: AuthorDate: Wed Nov 28 13:59:18 2007 +0100
: Commit: Linus Torvalds
: CommitDate: Wed Nov 28 10:58:01 2007 -0800
:
: vfs: coredumping fixSigned-off-by: Neil Horman
Cc: Andi Kleen
Cc: Oleg Nesterov
Cc: Alan Cox
Cc: Al Viro
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
User visible change.
do_coredump() kills all threads which share the same ->mm but only the
coredumping process gets the proper exit_code. Other tasks which share
the same ->mm die "silently" and return status == 0 to parent.This is historical behaviour, not actually a bug. But I think Frank
Heckenbach rightly dislikes the current behaviour. Simple test-case:#include
#include
#include
#includeint main(void)
{
int stat;if (!fork()) {
if (!vfork())
kill(getpid(), SIGQUIT);
}wait(&stat);
printf("stat=%x\n", stat);
return 0;
}Before this patch it prints "stat=0" despite the fact the child was killed
by SIGQUIT. After this patch the output is "stat=3" which obviously makes
more sense.Even with this patch, only the task which originates the coredumping gets
"|= 0x80" if the core was actually dumped, but at least the coredumping
signal is visible to do_wait/etc.Reported-by: Frank Heckenbach
Signed-off-by: Oleg Nesterov
Acked-by: WANG Cong
Cc: Roland McGrath
Cc: Neil Horman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pass mm->flags as a coredump parameter for consistency.
---
1787 if (mm->core_state || !get_dumpable(mm)) { mmap_sem);
1789 put_cred(cred);
1790 goto fail;
1791 }
1792
[...]
1798 if (get_dumpable(mm) == 2) { /* Setuid core dump mode */ fsuid = 0; /* Dump root private */
1801 }
---Since dumpable bits are not protected by lock, there is a chance to change
these bits between (1) and (2).To solve this issue, this patch copies mm->flags to
coredump_params.mm_flags at the beginning of do_coredump() and uses it
instead of get_dumpable() while dumping core.This copy is also passed to binfmt->core_dump, since elf*_core_dump() uses
dump_filter bits in mm->flags.[akpm@linux-foundation.org: fix merge]
Signed-off-by: Masami Hiramatsu
Acked-by: Roland McGrath
Cc: Hidehiro Kawai
Cc: Oleg Nesterov
Cc: Ingo Molnar
Reviewed-by: KOSAKI Motohiro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The current ELF dumper implementation can produce broken corefiles if
program headers exceed 65535. This number is determined by the number of
vmas which the process have. In particular, some extreme programs may use
more than 65535 vmas. (If you google max_map_count, you can find some
users facing this problem.) This kind of program never be able to generate
correct coredumps.This patch implements ``extended numbering'' that uses sh_info field of
the first section header instead of e_phnum field in order to represent
upto 4294967295 vmas.This is supported by
AMD64-ABI(http://www.x86-64.org/documentation.html) and
Solaris(http://docs.sun.com/app/docs/doc/817-1984/).
Of course, we are preparing patches for gdb and binutils.Signed-off-by: Daisuke HATAYAMA
Cc: "Luck, Tony"
Cc: Jeff Dike
Cc: David Howells
Cc: Greg Ungerer
Cc: Roland McGrath
Cc: Oleg Nesterov
Cc: Ingo Molnar
Cc: Alexander Viro
Cc: Andi Kleen
Cc: Alan Cox
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
By the next patch, elf_core_dump() and elf_fdpic_core_dump() will support
extended numbering and so will produce the corefiles with section header
table in a special case.The problem is the process of writing a file header offset of the section
header table into e_shoff field of the ELF header. ELF header is
positioned at the beginning of the corefile, while section header at the
end. So, we need to take which of the following ways:1. Seek backward to retry writing operation for ELF header
after writing process for a whole part2. Make offset calculation process and writing process
totally sequentialThe clause 1. is not always possible: one cannot assume that file system
supports seek function. Consider the no_llseek case.Therefore, this patch adopts the clause 2.
Signed-off-by: Daisuke HATAYAMA
Cc: "Luck, Tony"
Cc: Jeff Dike
Cc: David Howells
Cc: Greg Ungerer
Cc: Roland McGrath
Cc: Oleg Nesterov
Cc: Ingo Molnar
Cc: Alexander Viro
Cc: Andi Kleen
Cc: Alan Cox
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
elf_core_dump() and elf_fdpic_core_dump() use #ifdef and the corresponding
macro for hiding _multiline_ logics in functions. This patch removes
#ifdef and replaces ELF_CORE_EXTRA_* by corresponding functions. For
architectures not implemeonting ELF_CORE_EXTRA_*, we use weak functions in
order to reduce a range of modification.This cleanup is for my next patches, but I think this cleanup itself is
worth doing regardless of my firnal purpose.Signed-off-by: Daisuke HATAYAMA
Cc: "Luck, Tony"
Cc: Jeff Dike
Cc: David Howells
Cc: Greg Ungerer
Cc: Roland McGrath
Cc: Oleg Nesterov
Cc: Ingo Molnar
Cc: Alexander Viro
Cc: Andi Kleen
Cc: Alan Cox
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
My next patch will replace ELF_CORE_EXTRA_* macros by functions, putting
them into other newly created *.c files. Then, each files will contain
dump_write(), where each pair of binfmt_*.c and elfcore.c should be the
same. So, this patch moves them into a header file with dump_seek().
Also, the patch deletes confusing DUMP_WRITE macros in each files.Signed-off-by: Daisuke HATAYAMA
Cc: "Luck, Tony"
Cc: Jeff Dike
Cc: David Howells
Cc: Greg Ungerer
Cc: Roland McGrath
Cc: Oleg Nesterov
Cc: Ingo Molnar
Cc: Alexander Viro
Cc: Andi Kleen
Cc: Alan Cox
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The current ELF dumper can produce broken corefiles if program headers
exceed 65535. In particular, the program in 64-bit environment often
demands more than 65535 mmaps. If you google max_map_count, then you can
find many users facing this problem.Solaris has already dealt with this issue, and other OSes have also
adopted the same method as in Solaris. Currently, Sun's document and AMD
64 ABI include the description for the extension, where they call the
extension Extended Numbering. See Reference for further information.I believe that linux kernel should adopt the same way as they did, so I've
written this patch.I am also preparing for patches of GDB and binutils.
How to fix
==========In new dumping process, there are two cases according to weather or
not the number of program headers is equal to or more than 65535.- if less than 65535, the produced corefile format is exactly the same
as the ordinary one.- if equal to or more than 65535, then e_phnum field is set to newly
introduced constant PN_XNUM(0xffff) and the actual number of program
headers is set to sh_info field of the section header at index 0.Compatibility Concern
=====================* As already mentioned in Summary, Sun and AMD64 has already adopted
this. See Reference.* There are four combinations according to whether kernel and userland
tools are respectively modified or not. The next table summarizes
shortly for each combination.---------------------------------------------
Original Kernel | Modified Kernel
---------------------------------------------
< 65535 | >= 65535 | < 65535 | >= 65535
-------------------------------------------------------------
Original Tools | OK | broken | OK | broken (#)
-------------------------------------------------------------
Modified Tools | OK | broken | OK | OK
-------------------------------------------------------------Note that there is no case that `OK' changes to `broken'.
(#) Although this case remains broken, O-M behaves better than
O-O. That is, while in O-O case e_phnum field would be extremely
small due to integer overflow, in O-M case it is guaranteed to be at
least 65535 by being set to PN_XNUM(0xFFFF), much closer to the
actual correct value than the O-O case.Test Program
============Here is a test program mkmmaps.c that is useful to produce the
corefile with many mmaps. To use this, please take the following
steps:$ ulimit -c unlimited
$ sysctl vm.max_map_count=70000 # default 65530 is too small
$ sysctl fs.file-max=70000
$ mkmmaps 65535Then, the program will abort and a corefile will be generated.
If failed, there are two cases according to the error message
displayed.* ``out of memory'' means vm.max_map_count is still smaller
* ``too many open files'' means fs.file-max is still smaller
So, please change it to a larger value, and then retry it.
mkmmaps.c
==
#include
#include
#include
#include
#include
int main(int argc, char **argv)
{
int maps_num;
if (argc < 2) {
fprintf(stderr, "mkmmaps [number of maps to be created]\n");
exit(1);
}
if (sscanf(argv[1], "%d", &maps_num) == EOF) {
perror("sscanf");
exit(2);
}
if (maps_num < 0) {
fprintf(stderr, "%d is invalid\n", maps_num);
exit(3);
}
for (; maps_num > 0; --maps_num) {
if (MAP_FAILED == mmap((void *)NULL, (size_t) 1, PROT_READ,
MAP_SHARED | MAP_ANONYMOUS, (int) -1,
(off_t) NULL)) {
perror("mmap");
exit(4);
}
}
abort();
{
char buffer[128];
sprintf(buffer, "wc -l /proc/%u/maps", getpid());
system(buffer);
}
return 0;
}Tested on i386, ia64 and um/sys-i386.
Built on sh4 (which covers fs/binfmt_elf_fdpic.c)References
==========- Sun microsystems: Linker and Libraries.
Part No: 817-1984-17, September 2008.
URL: http://docs.sun.com/app/docs/doc/817-1984- System V ABI AMD64 Architecture Processor Supplement
Draft Version 0.99., May 11, 2009.
URL: http://www.x86-64.org/This patch:
There are three different definitions for dump_seek() functions in
binfmt_aout.c, binfmt_elf.c and binfmt_elf_fdpic.c, respectively. The
only for binfmt_elf.c.My next patch will move dump_seek() into a header file in order to share
the same implementations for dump_write() and dump_seek(). As the first
step, this patch unify these three definitions for dump_seek() by applying
the past commits that have been applied only for binfmt_elf.c.Specifically, the modification made here is part of the following commits:
* d025c9db7f31fc0554ce7fb2dfc78d35a77f3487
* 7f14daa19ea36b200d237ad3ac5826ae25360461This patch does not change a shape of corefiles.
Signed-off-by: Daisuke HATAYAMA
Cc: "Luck, Tony"
Cc: Jeff Dike
Cc: David Howells
Cc: Greg Ungerer
Cc: Roland McGrath
Cc: Oleg Nesterov
Cc: Ingo Molnar
Cc: Alexander Viro
Cc: Andi Kleen
Cc: Alan Cox
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
* warn if creation goes on to non-existent directory
* warn if removal goes on from non-existing directory
* warn if non-existing proc entry is removedSigned-off-by: Alexey Dobriyan
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
remove_proc_entry() does
lock
lookup parent
unlock
lock
unlink proc entry from lists
unlockwhich can be made bit more correct by doing parent translation + unlink
without dropping lock.Signed-off-by: Alexey Dobriyan
Cc: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
While testing an ADC121S021 in an embedded board with a S3C2142 SoC (ARM
core), I have found that the 'adcxx' driver does not handle correctly
single channel ADCs from this chip family. For single channel chips you
must only issue one read transfer for correct measurement.Signed-off-by: Jose Miguel Goncalves
Cc: Marc Pignat
Cc: Anton Vorontsov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
String constants that are continued on subsequent lines with \ will cause
spurious whitespace in the resulting output.Signed-off-by: Joe Perches
Cc: Roger Lucas
Cc: Jean Delvare
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Joakim Tjernlund
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Joe Perches
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Alberto Panizzo
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Based on Arjan's suggestion, extend the list of ops structures that should
be const.Signed-off-by: Emese Revfy
Cc: Andy Whitcroft
Cc: Arjan van de Ven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Here is a small code snippet, which will be complained about by
checkpatch.pl:#define __STRUCT_KFIFO_COMMON(recsize, ptrtype) \
union { \
struct { \
unsigned int in; \
unsigned int out; \
}; \
char rectype[recsize]; \
ptrtype *ptr; \
const ptrtype *ptr_const; \
};This construct is legal and safe, so checkpatch.pl should accept this. It
should be also true for struct defined in a macro.Add the `struct' and `union' keywords to the exceptions list of the
checkpatch.pl script, to prevent error message "Macros with multiple
statements should be enclosed in a do - while loop". Otherwise it is not
possible to build a struct or union with a macro.Signed-off-by: Stefani Seibold
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
checkpatch falsely complained about '__initconst' because it thought the
'const' needed a space before. Fix this by changing the list of
attributes:- add '__initconst'
- force plain 'init' to contain a word-boundary at the endSigned-off-by: Wolfram Sang
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Joe Perches
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
In case if the statement and the conditional are in one line, the line
appears in the report doubly.And items of this check have no blank line before the next item.
This patch fixes these trivial problems, to improve readability of the
report.[sample.c]
> if (cond1
> && cond2
> && cond3) func_foo();
>
> if (cond4) func_bar();Before:
> ERROR: trailing statements should be on next line
> #1: FILE: sample.c:1:
> +if (cond1
> [...]
> + && cond3) func_foo();
> ERROR: trailing statements should be on next line
> #5: FILE: sample.c:5:
> +if (cond4) func_bar();
> +if (cond4) func_bar();
> total: 2 errors, 0 warnings, 5 lines checkedAfter:
> ERROR: trailing statements should be on next line
> #1: FILE: sample.c:1:
> +if (cond1
> [...]
> + && cond3) func_foo();
>
> ERROR: trailing statements should be on next line
> #5: FILE: sample.c:5:
> +if (cond4) func_bar();
>
> total: 2 errors, 0 warnings, 5 lines checkedSigned-off-by: Hidetoshi Seto
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sizeof(&foo) is frequently an error. Warn on its use.
Signed-off-by: Joe Perches
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This card reader doesn't advertise, however DMA works well. Probably
windows SDHCI driver assumes that all readers support DMA and thus we see
that bug.Signed-off-by: Vasily Khoruzhick
Tested-by: Maxim Levitsky
Signed-off-by: Maxim Levitsky
Cc: Harald Welte
Cc: Norbert Preining
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
kunmap_atomic() accepts a pointer to any location in the page so we do not
need the subtraction and cast.Signed-off-by: Nicolas Ferre
Cc: Wolfgang Muees
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We used to manage features and differences on a per-cpu basis. As several
cpus share the same mci revision, this patch aggregates cpus that have the
same IP revision in one defined constant. We use the
at91mci_is_mci1rev2xx() funtion name not to mess with newer Atmel sd/mmc
IP called "MCI2". _rev2 naming could have been confusing...Signed-off-by: Nicolas Ferre
Cc: Wolfgang Muees
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
According to the datasheets AT91SAM9261 does not support SDIO interrupts,
and AT91SAM9260/9263 have an erratum requiring 4bit mode while using slot
B for the interrupt to work.Signed-off-by: Nicolas Ferre
Cc: Wolfgang Muees
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch is setting some max_ variables for the IO elevator, so the
elevator will put requests for large data blocks to the driver. This is
critical fora) speed
and
b) wear leveling of the flash chip controller: Otherwise the controller
will treat the SD card badly with millions of single 4 KByte write
commands. This will lead to a shorter life time for the SD cards.Signed-off-by: Wolfgang Muees
Signed-off-by: Nicolas Ferre
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Convert the read to use the DMA buffer as well. The old code was doing
double-buffering DMA with the PDC; no way to make it work. Replace it
with a single-PDC approach. It also simplify things removing the need for
a pre_dma_read() function.[nicolas.ferre@atmel.com coding style modifications]
Signed-off-by: Wolfgang Muees
Signed-off-by: Nicolas Ferre
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The TX DMA buffer is allocated only once, because the
allocation/deallocation of the buffer for EACH chunk of data is
time-consuming and prone to memory fragmentation.Using a coherent DMA buffer avoids extra data cache calls.
[nicolas.ferre@atmel.com: coding style modifications]
Signed-off-by: Wolfgang Muees
Signed-off-by: Nicolas Ferre
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix two timeout errors, one for slow SDHC cards and one for slow users
while inserting SD cards.Signed-off-by: Wolfgang Muees
Signed-off-by: Nicolas Ferre
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fixes two pointer errors, one which leads to memory overwrites if used
with large chunks of data.Signed-off-by: Wolfgang Muees
Signed-off-by: Nicolas Ferre
Cc: Andrew Victor
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Lars-Peter Clausen
Cc: Ben Dooks
Cc:
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
If no platform_data was givin to the device it's going to use it's default
platform data struct which has all fields initialized to zero. As a
result the driver is going to try to request gpio0 both as write protect
and card detect pin. Which of course will fail and makes the driver
unusablePreviously to the introduction of no_wprotect and no_detect the behavior
was to assume that if no platform data was given there is no write protect
or card detect pin. This patch restores that behavior.Signed-off-by: Lars-Peter Clausen
Cc: Ben Dooks
Cc:
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
