diff options
| author |   Heiko Carstens <heiko.carstens@de.ibm.com> | 2015-10-06 16:23:29 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2015-10-14 14:32:14 +0200 |
| commit | ac25e790d9c3c9b5d34609b7dc1d60c09494c668 (patch) | |
| tree | 1ea07858e445c49e5529f2058977ed95b751c015 /arch/s390/include/asm/processor.h | |
| parent | s390/udelay: make udelay have busy loop semantics (diff) | |
| download | linux-dev-ac25e790d9c3c9b5d34609b7dc1d60c09494c668.tar.xz linux-dev-ac25e790d9c3c9b5d34609b7dc1d60c09494c668.zip | |
s390/flags: fix flag handling
The cpu flags and pt_regs flags fields are each 64 bits in size. A flag can
be set with helper functions like set_cpu_flags().
These functions create a mask using "1U << flag". This doesn't work if flag
is larger than 31, since 1U << 32 == 0.
So fix this in case we ever will have such flag numbers.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index 9e1cdcf8d124..eefe543f84c9 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -36,17 +36,17 @@ static inline void set_cpu_flag(int flag) { - S390_lowcore.cpu_flags |= (1U << flag); + S390_lowcore.cpu_flags |= (1UL << flag); } static inline void clear_cpu_flag(int flag) { - S390_lowcore.cpu_flags &= ~(1U << flag); + S390_lowcore.cpu_flags &= ~(1UL << flag); } static inline int test_cpu_flag(int flag) { - return !!(S390_lowcore.cpu_flags & (1U << flag)); + return !!(S390_lowcore.cpu_flags & (1UL << flag)); } #define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY) |