diff options
| author | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-28 11:50:25 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-29 13:23:02 -0800 |
| commit | 7ac468b1300f35143a9b5b100e3970ca7ae1d9b8 (patch) | |
| tree | 1c928b80c897acc8bf7f47de8ef3793c5ba30c2c /arch/x86 | |
| parent | d55c5a93db2d5fa95f233ab153f594365d95b777 (diff) | |
x86, 386 removal: Remove CONFIG_XADD
All 486+ CPUs support XADD, so remove the fallback 386 support
code.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Link: http://lkml.kernel.org/r/1354132230-21854-4-git-send-email-hpa@linux.intel.com
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 5 | ||||
| -rw-r--r-- | arch/x86/Kconfig.cpu | 3 | ||||
| -rw-r--r-- | arch/x86/include/asm/atomic.h | 16 | ||||
| -rw-r--r-- | arch/x86/include/asm/local.h | 18 | ||||
| -rw-r--r-- | arch/x86/um/Kconfig | 2 |
5 files changed, 2 insertions, 42 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index a1a662721f8..631b298ac5b 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -171,13 +171,8 @@ config ARCH_MAY_HAVE_PC_FDC def_bool y depends on ISA_DMA_API -config RWSEM_GENERIC_SPINLOCK - def_bool y - depends on !X86_XADD - config RWSEM_XCHGADD_ALGORITHM def_bool y - depends on X86_XADD config GENERIC_CALIBRATE_DELAY def_bool y diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu index 1290a696349..52955eeeb1e 100644 --- a/arch/x86/Kconfig.cpu +++ b/arch/x86/Kconfig.cpu @@ -304,9 +304,6 @@ config X86_L1_CACHE_SHIFT default "4" if MELAN || M486 || MGEODEGX1 default "5" if MWINCHIP3D || MWINCHIPC6 || MCRUSOE || MEFFICEON || MCYRIXIII || MK6 || MPENTIUMIII || MPENTIUMII || M686 || M586MMX || M586TSC || M586 || MVIAC3_2 || MGEODE_LX -config X86_XADD - def_bool y - config X86_PPRO_FENCE bool "PentiumPro memory ordering errata workaround" depends on M686 || M586MMX || M586TSC || M586 || M486 || MGEODEGX1 diff --git a/arch/x86/include/asm/atomic.h b/arch/x86/include/asm/atomic.h index b6c3b821acf..722aa3b0462 100644 --- a/arch/x86/include/asm/atomic.h +++ b/arch/x86/include/asm/atomic.h @@ -172,23 +172,7 @@ static inline int atomic_add_negative(int i, atomic_t *v) */ static inline int atomic_add_return(int i, atomic_t *v) { -#ifdef CONFIG_M386 - int __i; - unsigned long flags; - if (unlikely(boot_cpu_data.x86 <= 3)) - goto no_xadd; -#endif - /* Modern 486+ processor */ return i + xadd(&v->counter, i); - -#ifdef CONFIG_M386 -no_xadd: /* Legacy 386 processor */ - raw_local_irq_save(flags); - __i = atomic_read(v); - atomic_set(v, i + __i); - raw_local_irq_restore(flags); - return i + __i; -#endif } /** diff --git a/arch/x86/include/asm/local.h b/arch/x86/include/asm/local.h index c8bed0da434..2d89e3980cb 100644 --- a/arch/x86/include/asm/local.h +++ b/arch/x86/include/asm/local.h @@ -124,27 +124,11 @@ static inline int local_add_negative(long i, local_t *l) */ static inline long local_add_return(long i, local_t *l) { - long __i; -#ifdef CONFIG_M386 - unsigned long flags; - if (unlikely(boot_cpu_data.x86 <= 3)) - goto no_xadd; -#endif - /* Modern 486+ processor */ - __i = i; + long __i = i; asm volatile(_ASM_XADD "%0, %1;" : "+r" (i), "+m" (l->a.counter) : : "memory"); return i + __i; - -#ifdef CONFIG_M386 -no_xadd: /* Legacy 386 processor */ - local_irq_save(flags); - __i = local_read(l); - local_set(l, i + __i); - local_irq_restore(flags); - return i + __i; -#endif } static inline long local_sub_return(long i, local_t *l) diff --git a/arch/x86/um/Kconfig b/arch/x86/um/Kconfig index 07611759ce3..b0c30dae9f5 100644 --- a/arch/x86/um/Kconfig +++ b/arch/x86/um/Kconfig @@ -31,7 +31,7 @@ config X86_64 select MODULES_USE_ELF_RELA config RWSEM_XCHGADD_ALGORITHM - def_bool X86_XADD && 64BIT + def_bool 64BIT config RWSEM_GENERIC_SPINLOCK def_bool !RWSEM_XCHGADD_ALGORITHM |