linux-sg2042/arch/mn10300
Linus Torvalds 5336377d62 modules: Fix module_bug_list list corruption race
With all the recent module loading cleanups, we've minimized the code
that sits under module_mutex, fixing various deadlocks and making it
possible to do most of the module loading in parallel.

However, that whole conversion totally missed the rather obscure code
that adds a new module to the list for BUG() handling.  That code was
doubly obscure because (a) the code itself lives in lib/bugs.c (for
dubious reasons) and (b) it gets called from the architecture-specific
"module_finalize()" rather than from generic code.

Calling it from arch-specific code makes no sense what-so-ever to begin
with, and is now actively wrong since that code isn't protected by the
module loading lock any more.

So this commit moves the "module_bug_{finalize,cleanup}()" calls away
from the arch-specific code, and into the generic code - and in the
process protects it with the module_mutex so that the list operations
are now safe.

Future fixups:
 - move the module list handling code into kernel/module.c where it
   belongs.
 - get rid of 'module_bug_list' and just use the regular list of modules
   (called 'modules' - imagine that) that we already create and maintain
   for other reasons.

Reported-and-tested-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Adrian Bunk <bunk@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-10-05 11:29:27 -07:00
..
boot MN10300: Don't try and #include <linux/slab.h> in lib/inflate.c from bootloader 2010-08-12 09:51:35 -07:00
configs defconfig reduction 2010-08-14 22:26:53 +02:00
include/asm MN10300: Fix SIGRTMAX 2010-09-23 10:20:57 -07:00
kernel modules: Fix module_bug_list list corruption race 2010-10-05 11:29:27 -07:00
lib mn10300: add cc clobbers to asm statements 2010-01-11 09:34:10 -08:00
mm MN10300: Fix flush_icache_range() 2010-10-01 15:01:47 -07:00
oprofile MN10300: Kill MN10300's own profiling Kconfig 2009-04-09 10:53:16 -07:00
proc-mn103e010 Separate out the proc- and unit-specific header directories from the general 2009-04-10 14:33:48 +01:00
unit-asb2303 mn10300: fix kernel build failures when using gcc-4.x 2009-10-01 16:11:12 -07:00
unit-asb2305 PCI: clear bridge resource range if BIOS assigned bad one 2010-06-11 13:24:51 -07:00
Kconfig MN10300: Arch doesn't support HAVE_ARCH_TRACEHOOK 2010-09-23 10:20:58 -07:00
Kconfig.debug MN10300: Default config choice GDBSTUB_TTYSM0 should be GDBSTUB_ON_TTYSM0 2010-09-27 16:29:06 -07:00
Makefile mn10300: objcopy flags fix 2010-01-11 09:34:09 -08:00