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Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull locking fixes from Ingo Molnar:
 "liblockdep fixes and mutex debugging fixes"

* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  locking/mutex: Fix debug_mutexes
  tools/liblockdep: Add proper versioning to the shared obj
  tools/liblockdep: Ignore asmlinkage and visible
This commit is contained in:
Linus Torvalds 2014-04-16 16:35:18 -07:00
commit d99d5917e7
3 changed files with 16 additions and 21 deletions
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19
kernel/locking/mutex-debug.c
View file

@ -71,18 +71,17 @@ void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
void debug_mutex_unlock(struct mutex *lock)
{
if (unlikely(!debug_locks))
return;
if (likely(debug_locks)) {
DEBUG_LOCKS_WARN_ON(lock->magic != lock);
DEBUG_LOCKS_WARN_ON(lock->magic != lock);
if (!lock->owner)
DEBUG_LOCKS_WARN_ON(!lock->owner);
else
DEBUG_LOCKS_WARN_ON(lock->owner != current);
if (!lock->owner)
DEBUG_LOCKS_WARN_ON(!lock->owner);
else
DEBUG_LOCKS_WARN_ON(lock->owner != current);
DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
mutex_clear_owner(lock);
DEBUG_LOCKS_WARN_ON(!lock->wait_list.prev && !lock->wait_list.next);
mutex_clear_owner(lock);
}
/*
* __mutex_slowpath_needs_to_unlock() is explicitly 0 for debug

15
tools/lib/lockdep/Makefile
View file

@ -1,13 +1,8 @@
# liblockdep version
LL_VERSION = 0
LL_PATCHLEVEL = 0
LL_EXTRAVERSION = 1
# file format version
FILE_VERSION = 1
MAKEFLAGS += --no-print-directory
LIBLOCKDEP_VERSION=$(shell make -sC ../../.. kernelversion)
# Makefiles suck: This macro sets a default value of $(2) for the
# variable named by $(1), unless the variable has been set by
@ -98,7 +93,7 @@ export prefix libdir bindir src obj
libdir_SQ = $(subst ','\'',$(libdir))
bindir_SQ = $(subst ','\'',$(bindir))
LIB_FILE = liblockdep.a liblockdep.so
LIB_FILE = liblockdep.a liblockdep.so.$(LIBLOCKDEP_VERSION)
BIN_FILE = lockdep
CONFIG_INCLUDES =
@ -110,8 +105,6 @@ N =
export Q VERBOSE
LIBLOCKDEP_VERSION = $(LL_VERSION).$(LL_PATCHLEVEL).$(LL_EXTRAVERSION)
INCLUDES = -I. -I/usr/local/include -I./uinclude -I./include $(CONFIG_INCLUDES)
# Set compile option CFLAGS if not set elsewhere
@ -146,7 +139,7 @@ do_app_build = \
do_compile_shared_library = \
($(print_shared_lib_compile) \
$(CC) --shared $^ -o $@ -lpthread -ldl)
$(CC) --shared $^ -o $@ -lpthread -ldl -Wl,-soname='"$@"';$(shell ln -s $@ liblockdep.so))
do_build_static_lib = \
($(print_static_lib_build) \
@ -177,7 +170,7 @@ all: all_cmd
all_cmd: $(CMD_TARGETS)
liblockdep.so: $(PEVENT_LIB_OBJS)
liblockdep.so.$(LIBLOCKDEP_VERSION): $(PEVENT_LIB_OBJS)
$(Q)$(do_compile_shared_library)
liblockdep.a: $(PEVENT_LIB_OBJS)

3
tools/lib/lockdep/uinclude/linux/lockdep.h
View file

@ -10,6 +10,9 @@
#define MAX_LOCK_DEPTH 2000UL
#define asmlinkage
#define __visible
#include "../../../include/linux/lockdep.h"
struct task_struct {