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| author | Thomas Gleixner <tglx@linutronix.de> | 2013-04-24 20:33:46 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2013-04-24 20:33:54 +0200 |
| commit | 6402c7dc2a19c19bd8cdc7d80878b850da418942 (patch) | |
| tree | cda2ea2df40442e2aa016119f3548cc504127ea8 /arch/tile/include/asm/irqflags.h | |
| parent | timekeeping: Update tk->cycle_last in resume (diff) | |
| parent | Linux 3.9-rc8 (diff) | |
| download | linux-6402c7dc2a19c19bd8cdc7d80878b850da418942.tar.xz linux-6402c7dc2a19c19bd8cdc7d80878b850da418942.zip | |
Merge branch 'linus' into timers/core
Reason: Get upstream fixes before adding conflicting code.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/tile/include/asm/irqflags.h')
| -rw-r--r-- | arch/tile/include/asm/irqflags.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/arch/tile/include/asm/irqflags.h b/arch/tile/include/asm/irqflags.h index 241c0bb60b12..c96f9bbb760d 100644 --- a/arch/tile/include/asm/irqflags.h +++ b/arch/tile/include/asm/irqflags.h @@ -40,7 +40,15 @@ #include <asm/percpu.h> #include <arch/spr_def.h> -/* Set and clear kernel interrupt masks. */ +/* + * Set and clear kernel interrupt masks. + * + * NOTE: __insn_mtspr() is a compiler builtin marked as a memory + * clobber. We rely on it being equivalent to a compiler barrier in + * this code since arch_local_irq_save() and friends must act as + * compiler barriers. This compiler semantic is baked into enough + * places that the compiler will maintain it going forward. + */ #if CHIP_HAS_SPLIT_INTR_MASK() #if INT_PERF_COUNT < 32 || INT_AUX_PERF_COUNT < 32 || INT_MEM_ERROR >= 32 # error Fix assumptions about which word various interrupts are in |