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author | David S. Miller <davem@sunset.davemloft.net> | 2006-12-18 03:18:47 +0300 |
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committer | David S. Miller <davem@sunset.davemloft.net> | 2006-12-18 03:18:47 +0300 |
commit | 8a8b836b91aa170a383f2f360b73d3d23160d9d7 (patch) | |
tree | 875a635f634a869b801c4efa8f145c5b7b7db8e4 /arch/sparc | |
parent | 216da721b881838d639a3987bf8a825e6b4aacdd (diff) | |
download | linux-8a8b836b91aa170a383f2f360b73d3d23160d9d7.tar.xz |
[SPARC]: Make bitops use same spinlocks as atomics.
Recent workqueue changes basically make this a formal requirement.
Also, move atomic32.o from lib-y to obj-y since it exports symbols
to modules.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc')
-rw-r--r-- | arch/sparc/kernel/sparc_ksyms.c | 8 | ||||
-rw-r--r-- | arch/sparc/kernel/time.c | 5 | ||||
-rw-r--r-- | arch/sparc/lib/Makefile | 4 | ||||
-rw-r--r-- | arch/sparc/lib/atomic32.c | 39 | ||||
-rw-r--r-- | arch/sparc/lib/bitops.S | 109 |
5 files changed, 42 insertions, 123 deletions
diff --git a/arch/sparc/kernel/sparc_ksyms.c b/arch/sparc/kernel/sparc_ksyms.c index 33dadd9f2871..d8e008a04e2b 100644 --- a/arch/sparc/kernel/sparc_ksyms.c +++ b/arch/sparc/kernel/sparc_ksyms.c @@ -83,9 +83,6 @@ extern int __divdi3(int, int); /* Private functions with odd calling conventions. */ extern void ___atomic24_add(void); extern void ___atomic24_sub(void); -extern void ___set_bit(void); -extern void ___clear_bit(void); -extern void ___change_bit(void); extern void ___rw_read_enter(void); extern void ___rw_read_try(void); extern void ___rw_read_exit(void); @@ -125,11 +122,6 @@ EXPORT_SYMBOL(pfn_base); EXPORT_SYMBOL(___atomic24_add); EXPORT_SYMBOL(___atomic24_sub); -/* Bit operations. */ -EXPORT_SYMBOL(___set_bit); -EXPORT_SYMBOL(___clear_bit); -EXPORT_SYMBOL(___change_bit); - /* Per-CPU information table */ EXPORT_PER_CPU_SYMBOL(__cpu_data); diff --git a/arch/sparc/kernel/time.c b/arch/sparc/kernel/time.c index 6c7aa51b590f..2fcce000d877 100644 --- a/arch/sparc/kernel/time.c +++ b/arch/sparc/kernel/time.c @@ -78,7 +78,6 @@ unsigned long profile_pc(struct pt_regs *regs) extern char __copy_user_begin[], __copy_user_end[]; extern char __atomic_begin[], __atomic_end[]; extern char __bzero_begin[], __bzero_end[]; - extern char __bitops_begin[], __bitops_end[]; unsigned long pc = regs->pc; @@ -88,9 +87,7 @@ unsigned long profile_pc(struct pt_regs *regs) (pc >= (unsigned long) __atomic_begin && pc < (unsigned long) __atomic_end) || (pc >= (unsigned long) __bzero_begin && - pc < (unsigned long) __bzero_end) || - (pc >= (unsigned long) __bitops_begin && - pc < (unsigned long) __bitops_end)) + pc < (unsigned long) __bzero_end)) pc = regs->u_regs[UREG_RETPC]; return pc; } diff --git a/arch/sparc/lib/Makefile b/arch/sparc/lib/Makefile index 5db7e1d85385..9ddc5b9ce3bd 100644 --- a/arch/sparc/lib/Makefile +++ b/arch/sparc/lib/Makefile @@ -7,7 +7,7 @@ EXTRA_AFLAGS := -ansi -DST_DIV0=0x02 lib-y := mul.o rem.o sdiv.o udiv.o umul.o urem.o ashrdi3.o memcpy.o memset.o \ strlen.o checksum.o blockops.o memscan.o memcmp.o strncmp.o \ strncpy_from_user.o divdi3.o udivdi3.o strlen_user.o \ - copy_user.o locks.o atomic.o atomic32.o bitops.o \ + copy_user.o locks.o atomic.o \ lshrdi3.o ashldi3.o rwsem.o muldi3.o bitext.o -obj-y += iomap.o +obj-y += iomap.o atomic32.o diff --git a/arch/sparc/lib/atomic32.c b/arch/sparc/lib/atomic32.c index de84f8534bac..53ddcd9d1e60 100644 --- a/arch/sparc/lib/atomic32.c +++ b/arch/sparc/lib/atomic32.c @@ -76,3 +76,42 @@ void atomic_set(atomic_t *v, int i) spin_unlock_irqrestore(ATOMIC_HASH(v), flags); } EXPORT_SYMBOL(atomic_set); + +unsigned long ___set_bit(unsigned long *addr, unsigned long mask) +{ + unsigned long old, flags; + + spin_lock_irqsave(ATOMIC_HASH(addr), flags); + old = *addr; + *addr = old | mask; + spin_unlock_irqrestore(ATOMIC_HASH(addr), flags); + + return old & mask; +} +EXPORT_SYMBOL(___set_bit); + +unsigned long ___clear_bit(unsigned long *addr, unsigned long mask) +{ + unsigned long old, flags; + + spin_lock_irqsave(ATOMIC_HASH(addr), flags); + old = *addr; + *addr = old & ~mask; + spin_unlock_irqrestore(ATOMIC_HASH(addr), flags); + + return old & mask; +} +EXPORT_SYMBOL(___clear_bit); + +unsigned long ___change_bit(unsigned long *addr, unsigned long mask) +{ + unsigned long old, flags; + + spin_lock_irqsave(ATOMIC_HASH(addr), flags); + old = *addr; + *addr = old ^ mask; + spin_unlock_irqrestore(ATOMIC_HASH(addr), flags); + + return old & mask; +} +EXPORT_SYMBOL(___change_bit); diff --git a/arch/sparc/lib/bitops.S b/arch/sparc/lib/bitops.S deleted file mode 100644 index cb7fb66a40c8..000000000000 --- a/arch/sparc/lib/bitops.S +++ /dev/null @@ -1,109 +0,0 @@ -/* bitops.S: Low level assembler bit operations. - * - * Copyright (C) 1996 David S. Miller (davem@caip.rutgers.edu) - */ - -#include <asm/ptrace.h> -#include <asm/psr.h> - - .text - .align 4 - - .globl __bitops_begin -__bitops_begin: - - /* Take bits in %g2 and set them in word at %g1, - * return whether bits were set in original value - * in %g2. %g4 holds value to restore into %o7 - * in delay slot of jmpl return, %g3 + %g5 + %g7 can be - * used as temporaries and thus is considered clobbered - * by all callers. - */ - .globl ___set_bit -___set_bit: - rd %psr, %g3 - nop; nop; nop; - or %g3, PSR_PIL, %g5 - wr %g5, 0x0, %psr - nop; nop; nop -#ifdef CONFIG_SMP - set bitops_spinlock, %g5 -2: ldstub [%g5], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 2b ! Nope... -#endif - ld [%g1], %g7 - or %g7, %g2, %g5 - and %g7, %g2, %g2 -#ifdef CONFIG_SMP - st %g5, [%g1] - set bitops_spinlock, %g5 - stb %g0, [%g5] -#else - st %g5, [%g1] -#endif - wr %g3, 0x0, %psr - nop; nop; nop - jmpl %o7, %g0 - mov %g4, %o7 - - /* Same as above, but clears the bits from %g2 instead. */ - .globl ___clear_bit -___clear_bit: - rd %psr, %g3 - nop; nop; nop - or %g3, PSR_PIL, %g5 - wr %g5, 0x0, %psr - nop; nop; nop -#ifdef CONFIG_SMP - set bitops_spinlock, %g5 -2: ldstub [%g5], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 2b ! Nope... -#endif - ld [%g1], %g7 - andn %g7, %g2, %g5 - and %g7, %g2, %g2 -#ifdef CONFIG_SMP - st %g5, [%g1] - set bitops_spinlock, %g5 - stb %g0, [%g5] -#else - st %g5, [%g1] -#endif - wr %g3, 0x0, %psr - nop; nop; nop - jmpl %o7, %g0 - mov %g4, %o7 - - /* Same thing again, but this time toggles the bits from %g2. */ - .globl ___change_bit -___change_bit: - rd %psr, %g3 - nop; nop; nop - or %g3, PSR_PIL, %g5 - wr %g5, 0x0, %psr - nop; nop; nop -#ifdef CONFIG_SMP - set bitops_spinlock, %g5 -2: ldstub [%g5], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 2b ! Nope... -#endif - ld [%g1], %g7 - xor %g7, %g2, %g5 - and %g7, %g2, %g2 -#ifdef CONFIG_SMP - st %g5, [%g1] - set bitops_spinlock, %g5 - stb %g0, [%g5] -#else - st %g5, [%g1] -#endif - wr %g3, 0x0, %psr - nop; nop; nop - jmpl %o7, %g0 - mov %g4, %o7 - - .globl __bitops_end -__bitops_end: |