Implement __raw_read_lock_flags and __raw_write_lock_flags for the ia64 architecture. Signed-off-by: Petr Tesarik <ptesarik@xxxxxxx> --- arch/ia64/include/asm/spinlock.h | 58 ++++++++++++++++++++++++++++++++----- 1 files changed, 50 insertions(+), 8 deletions(-) diff --git a/arch/ia64/include/asm/spinlock.h b/arch/ia64/include/asm/spinlock.h index 0a61961..58f6a0d 100644 --- a/arch/ia64/include/asm/spinlock.h +++ b/arch/ia64/include/asm/spinlock.h @@ -120,6 +120,36 @@ do { \ #define __raw_read_can_lock(rw) (*(volatile int *)(rw) >= 0) #define __raw_write_can_lock(rw) (*(volatile int *)(rw) == 0) +#ifdef ASM_SUPPORTED +#define __raw_read_lock_flags(rw, flags) \ +do { \ + __asm__ __volatile__ ( \ + "tbit.nz p6, p0 = %1,%2\n" \ + "br.few 3f\n" \ + "1:\n" \ + "fetchadd4.rel r2 = [%0], -1;;\n" \ + "(p6) ssm psr.i\n" \ + "2:\n" \ + "hint @pause\n" \ + "ld4 r2 = [%0];;\n" \ + "cmp4.lt p7,p0 = r2, r0\n" \ + "(p7) br.cond.spnt.few 2b\n" \ + "(p6) rsm psr.i\n" \ + ";;\n" \ + "3:\n" \ + "fetchadd4.acq r2 = [%0], 1;;\n" \ + "cmp4.lt p7,p0 = r2, r0\n" \ + "(p7) br.cond.spnt.few 1b\n" \ + :: "r"(rw), "r"(flags), "i"(IA64_PSR_I_BIT) \ + : "p6", "p7", "r2", "memory"); \ +} while(0) + +#define __raw_read_lock(lock) __raw_read_lock_flags(lock, 0) + +#else /* !ASM_SUPPORTED */ + +#define __raw_read_lock_flags(rw, flags) __raw_read_lock(rw) + #define __raw_read_lock(rw) \ do { \ raw_rwlock_t *__read_lock_ptr = (rw); \ @@ -131,6 +161,8 @@ do { \ } \ } while (0) +#endif /* !ASM_SUPPORTED */ + #define __raw_read_unlock(rw) \ do { \ raw_rwlock_t *__read_lock_ptr = (rw); \ @@ -138,21 +170,32 @@ do { \ } while (0) #ifdef ASM_SUPPORTED -#define __raw_write_lock(rw) \ +#define __raw_write_lock_flags(rw, flags) \ do { \ __asm__ __volatile__ ( \ + "tbit.nz p6, p0 = %1, %2\n" \ "mov ar.ccv = r0\n" \ - "dep r29 = -1, r0, 31, 1;;\n" \ + "dep r29 = -1, r0, 31, 1\n" \ + "br.few 3f;;\n" \ "1:\n" \ + "(p6) ssm psr.i\n" \ + "2:\n" \ + "hint @pause\n" \ "ld4 r2 = [%0];;\n" \ - "cmp4.eq p0,p7 = r0,r2\n" \ - "(p7) br.cond.spnt.few 1b \n" \ + "cmp4.eq p0,p7 = r0, r2\n" \ + "(p7) br.cond.spnt.few 2b\n" \ + "(p6) rsm psr.i\n" \ + ";;\n" \ + "3:\n" \ "cmpxchg4.acq r2 = [%0], r29, ar.ccv;;\n" \ "cmp4.eq p0,p7 = r0, r2\n" \ "(p7) br.cond.spnt.few 1b;;\n" \ - :: "r"(rw) : "ar.ccv", "p7", "r2", "r29", "memory"); \ + :: "r"(rw), "r"(flags), "i"(IA64_PSR_I_BIT) \ + : "ar.ccv", "p6", "p7", "r2", "r29", "memory"); \ } while(0) +#define __raw_write_lock(rw) __raw_write_lock_flags(rw, 0) + #define __raw_write_trylock(rw) \ ({ \ register long result; \ @@ -174,6 +217,8 @@ static inline void __raw_write_unlock(raw_rwlock_t *x) #else /* !ASM_SUPPORTED */ +#define __raw_write_lock_flags(l, flags) __raw_write_lock(l) + #define __raw_write_lock(l) \ ({ \ __u64 ia64_val, ia64_set_val = ia64_dep_mi(-1, 0, 31, 1); \ @@ -213,9 +258,6 @@ static inline int __raw_read_trylock(raw_rwlock_t *x) return (u32)ia64_cmpxchg4_acq((__u32 *)(x), new.word, old.word) == old.word; } -#define __raw_read_lock_flags(lock, flags) __raw_read_lock(lock) -#define __raw_write_lock_flags(lock, flags) __raw_write_lock(lock) - #define _raw_spin_relax(lock) cpu_relax() #define _raw_read_relax(lock) cpu_relax() #define _raw_write_relax(lock) cpu_relax() -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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