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| author | Thomas Gleixner <tglx@linutronix.de> | 2017-03-09 12:06:41 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2017-03-09 12:06:41 +0100 |
| commit | 920c634aff6cb66e7f352668521eb1313897e93c (patch) | |
| tree | 0f2e2eb15756fdd93c8ea47f9080fc3c1abeeae6 /arch/powerpc/include/asm/bitops.h | |
| parent | b28ace12661fbcfd90959c1e84ff5a85113a82a1 (diff) | |
| parent | 4b9de5da7e120c7f02395da729f0ec77ce7a6044 (diff) | |
Merge tag 'irq-fixes-4.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip/irqdomain updates for 4.11-rc2 from Marc Zyngier
- irqchip/crossbar: Some type tidying up
- irqchip/gicv3-its: Workaround for a Qualcomm erratum
- irqdomain: Compile for for systems that don't use CONFIG_IRQ_DOMAIN
Fixed up minor conflict in the crossbar driver.
Diffstat (limited to 'arch/powerpc/include/asm/bitops.h')
| -rw-r--r-- | arch/powerpc/include/asm/bitops.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/bitops.h b/arch/powerpc/include/asm/bitops.h index 59abc620f8e8..73eb794d6163 100644 --- a/arch/powerpc/include/asm/bitops.h +++ b/arch/powerpc/include/asm/bitops.h @@ -154,6 +154,34 @@ static __inline__ int test_and_change_bit(unsigned long nr, return test_and_change_bits(BIT_MASK(nr), addr + BIT_WORD(nr)) != 0; } +#ifdef CONFIG_PPC64 +static __inline__ unsigned long clear_bit_unlock_return_word(int nr, + volatile unsigned long *addr) +{ + unsigned long old, t; + unsigned long *p = (unsigned long *)addr + BIT_WORD(nr); + unsigned long mask = BIT_MASK(nr); + + __asm__ __volatile__ ( + PPC_RELEASE_BARRIER +"1:" PPC_LLARX(%0,0,%3,0) "\n" + "andc %1,%0,%2\n" + PPC405_ERR77(0,%3) + PPC_STLCX "%1,0,%3\n" + "bne- 1b\n" + : "=&r" (old), "=&r" (t) + : "r" (mask), "r" (p) + : "cc", "memory"); + + return old; +} + +/* This is a special function for mm/filemap.c */ +#define clear_bit_unlock_is_negative_byte(nr, addr) \ + (clear_bit_unlock_return_word(nr, addr) & BIT_MASK(PG_waiters)) + +#endif /* CONFIG_PPC64 */ + #include <asm-generic/bitops/non-atomic.h> static __inline__ void __clear_bit_unlock(int nr, volatile unsigned long *addr) |