Will Deacon a14949e09a arm64: cmpxchg: truncate sub-word signed types before comparison ... When performing a cmpxchg operation on a signed sub-word type (e.g. s8), we need to ensure that the upper register bits of the "old" value used for comparison are zeroed, otherwise we may erroneously fail the cmpxchg which may even be interpreted as success by the caller (if the compiler performs the truncation as part of its check). This has been observed in mod_state, where negative values where causing problems with this_cpu_cmpxchg. This patch fixes the issue by explicitly casting 8-bit and 16-bit "old" values using unsigned types in our cmpxchg wrappers. 32-bit types can be left alone, since the underlying asm makes use of W registers in this case. Reported-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2015-07-30 20:16:53 +01:00
..
alpha	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
arc	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
arm	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
arm64	arm64: cmpxchg: truncate sub-word signed types before comparison	2015-07-30 20:16:53 +01:00
avr32	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
blackfin	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
c6x	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
cris	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
frv	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
h8300	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
hexagon	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
ia64	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
m32r	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
m68k	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
metag	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
microblaze	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
mips	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
mn10300	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
nios2	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
openrisc	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
parisc	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
powerpc	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
s390	atomic: Replace atomic_{set,clear}_mask() usage	2015-07-27 14:06:24 +02:00
score	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
sh	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
sparc	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
tile	atomic: Provide atomic_{or,xor,and}	2015-07-27 14:06:24 +02:00
um	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
unicore32	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
x86	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
xtensa	atomic: Collapse all atomic_{set,clear}_mask definitions	2015-07-27 14:06:24 +02:00
.gitignore
Kconfig	x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86	2015-07-18 03:42:51 +02:00