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| author | David S. Miller <davem@davemloft.net> | 2016-01-15 18:36:23 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-01-15 18:36:23 -0500 |
| commit | 7a26019fdecdb45ff784ae4e3b7e0cc9045100ca (patch) | |
| tree | 511474baafa5b5c0b072e88feaa6bb405724b34f /arch/s390/include/asm/processor.h | |
| parent | 725da8dee445662beea77d3f42c3f4c79f7a7a0e (diff) | |
| parent | 4e5448a31d73d0e944b7adb9049438a09bc332cb (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/s390/include/asm/processor.h')
| -rw-r--r-- | arch/s390/include/asm/processor.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index b16c3d0a1b9f..f16debf6a612 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -18,12 +18,14 @@ #define CIF_NOHZ_DELAY 2 /* delay HZ disable for a tick */ #define CIF_FPU 3 /* restore FPU registers */ #define CIF_IGNORE_IRQ 4 /* ignore interrupt (for udelay) */ +#define CIF_ENABLED_WAIT 5 /* in enabled wait state */ #define _CIF_MCCK_PENDING _BITUL(CIF_MCCK_PENDING) #define _CIF_ASCE _BITUL(CIF_ASCE) #define _CIF_NOHZ_DELAY _BITUL(CIF_NOHZ_DELAY) #define _CIF_FPU _BITUL(CIF_FPU) #define _CIF_IGNORE_IRQ _BITUL(CIF_IGNORE_IRQ) +#define _CIF_ENABLED_WAIT _BITUL(CIF_ENABLED_WAIT) #ifndef __ASSEMBLY__ @@ -52,6 +54,16 @@ static inline int test_cpu_flag(int flag) return !!(S390_lowcore.cpu_flags & (1UL << flag)); } +/* + * Test CIF flag of another CPU. The caller needs to ensure that + * CPU hotplug can not happen, e.g. by disabling preemption. + */ +static inline int test_cpu_flag_of(int flag, int cpu) +{ + struct lowcore *lc = lowcore_ptr[cpu]; + return !!(lc->cpu_flags & (1UL << flag)); +} + #define arch_needs_cpu() test_cpu_flag(CIF_NOHZ_DELAY) /* |