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| author | Ingo Molnar <mingo@kernel.org> | 2015-10-20 10:16:46 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-10-20 10:16:46 +0200 |
| commit | a1a2ab2ff7040bdc9a31bfe7173913971f7d723b (patch) | |
| tree | a5b448aaedafafca6974710b7d64074ed964fe24 /arch/powerpc/include/asm | |
| parent | 00eb4bab69db349c3bdc7e0b0f7e9070dafea58c (diff) | |
| parent | 7379047d5585187d1288486d4627873170d0005a (diff) | |
| download | linux-rt-a1a2ab2ff7040bdc9a31bfe7173913971f7d723b.tar.gz | |
Merge tag 'v4.3-rc6' into locking/core, to pick up fixes before applying new changes
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/Kbuild | 1 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/machdep.h | 9 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/word-at-a-time.h | 5 |
3 files changed, 12 insertions, 3 deletions
diff --git a/arch/powerpc/include/asm/Kbuild b/arch/powerpc/include/asm/Kbuild index ac1662956e0c..ab9f4e0ed4cf 100644 --- a/arch/powerpc/include/asm/Kbuild +++ b/arch/powerpc/include/asm/Kbuild @@ -7,4 +7,3 @@ generic-y += mcs_spinlock.h generic-y += preempt.h generic-y += rwsem.h generic-y += vtime.h -generic-y += word-at-a-time.h diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index cab6753f1be5..3f191f573d4f 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -61,8 +61,13 @@ struct machdep_calls { unsigned long addr, unsigned char *hpte_slot_array, int psize, int ssize, int local); - /* special for kexec, to be called in real mode, linear mapping is - * destroyed as well */ + /* + * Special for kexec. + * To be called in real mode with interrupts disabled. No locks are + * taken as such, concurrent access on pre POWER5 hardware could result + * in a deadlock. + * The linear mapping is destroyed as well. + */ void (*hpte_clear_all)(void); void __iomem * (*ioremap)(phys_addr_t addr, unsigned long size, diff --git a/arch/powerpc/include/asm/word-at-a-time.h b/arch/powerpc/include/asm/word-at-a-time.h index 5b3a903adae6..e4396a7d0f7c 100644 --- a/arch/powerpc/include/asm/word-at-a-time.h +++ b/arch/powerpc/include/asm/word-at-a-time.h @@ -40,6 +40,11 @@ static inline bool has_zero(unsigned long val, unsigned long *data, const struct return (val + c->high_bits) & ~rhs; } +static inline unsigned long zero_bytemask(unsigned long mask) +{ + return ~1ul << __fls(mask); +} + #else #ifdef CONFIG_64BIT |