diff options
| author | Sam Ravnborg <sam@ravnborg.org> | 2011-12-26 20:57:22 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-12-27 14:11:40 -0500 |
| commit | 348738afe530cc3a7306bbd3d1ccd322f9638f32 (patch) | |
| tree | 7ae88b2743aa8d1c0b5633b43877bd6aeecfe0c8 /arch/sparc/lib | |
| parent | 371de6e4e0042adf4f9b54c414154f57414ddd37 (diff) | |
sparc32: drop unused atomic24 support
atomic24 support was used to semaphores in the past - but is no longer used.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/lib')
| -rw-r--r-- | arch/sparc/lib/atomic_32.S | 55 | ||||
| -rw-r--r-- | arch/sparc/lib/ksyms.c | 6 |
2 files changed, 0 insertions, 61 deletions
diff --git a/arch/sparc/lib/atomic_32.S b/arch/sparc/lib/atomic_32.S index 178cbb8ae1b9..eb6c7359cbd1 100644 --- a/arch/sparc/lib/atomic_32.S +++ b/arch/sparc/lib/atomic_32.S @@ -40,60 +40,5 @@ ___xchg32_sun4md: mov %g4, %o7 #endif - /* Read asm-sparc/atomic.h carefully to understand how this works for SMP. - * Really, some things here for SMP are overly clever, go read the header. - */ - .globl ___atomic24_add -___atomic24_add: - rd %psr, %g3 ! Keep the code small, old way was stupid - nop; nop; nop; ! Let the bits set - or %g3, PSR_PIL, %g7 ! Disable interrupts - wr %g7, 0x0, %psr ! Set %psr - nop; nop; nop; ! Let the bits set -#ifdef CONFIG_SMP -1: ldstub [%g1 + 3], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 1b ! Nope... - ld [%g1], %g7 ! Load locked atomic24_t - sra %g7, 8, %g7 ! Get signed 24-bit integer - add %g7, %g2, %g2 ! Add in argument - sll %g2, 8, %g7 ! Transpose back to atomic24_t - st %g7, [%g1] ! Clever: This releases the lock as well. -#else - ld [%g1], %g7 ! Load locked atomic24_t - add %g7, %g2, %g2 ! Add in argument - st %g2, [%g1] ! Store it back -#endif - wr %g3, 0x0, %psr ! Restore original PSR_PIL - nop; nop; nop; ! Let the bits set - jmpl %o7, %g0 ! NOTE: not + 8, see callers in atomic.h - mov %g4, %o7 ! Restore %o7 - - .globl ___atomic24_sub -___atomic24_sub: - rd %psr, %g3 ! Keep the code small, old way was stupid - nop; nop; nop; ! Let the bits set - or %g3, PSR_PIL, %g7 ! Disable interrupts - wr %g7, 0x0, %psr ! Set %psr - nop; nop; nop; ! Let the bits set -#ifdef CONFIG_SMP -1: ldstub [%g1 + 3], %g7 ! Spin on the byte lock for SMP. - orcc %g7, 0x0, %g0 ! Did we get it? - bne 1b ! Nope... - ld [%g1], %g7 ! Load locked atomic24_t - sra %g7, 8, %g7 ! Get signed 24-bit integer - sub %g7, %g2, %g2 ! Subtract argument - sll %g2, 8, %g7 ! Transpose back to atomic24_t - st %g7, [%g1] ! Clever: This releases the lock as well -#else - ld [%g1], %g7 ! Load locked atomic24_t - sub %g7, %g2, %g2 ! Subtract argument - st %g2, [%g1] ! Store it back -#endif - wr %g3, 0x0, %psr ! Restore original PSR_PIL - nop; nop; nop; ! Let the bits set - jmpl %o7, %g0 ! NOTE: not + 8, see callers in atomic.h - mov %g4, %o7 ! Restore %o7 - .globl __atomic_end __atomic_end: diff --git a/arch/sparc/lib/ksyms.c b/arch/sparc/lib/ksyms.c index 1b30bb3bfdb1..f73c2240fe60 100644 --- a/arch/sparc/lib/ksyms.c +++ b/arch/sparc/lib/ksyms.c @@ -62,8 +62,6 @@ extern void ___rw_read_enter(void); extern void ___rw_read_try(void); extern void ___rw_read_exit(void); extern void ___rw_write_enter(void); -extern void ___atomic24_add(void); -extern void ___atomic24_sub(void); /* Alias functions whose names begin with "." and export the aliases. * The module references will be fixed up by module_frob_arch_sections. @@ -97,10 +95,6 @@ EXPORT_SYMBOL(___rw_read_exit); EXPORT_SYMBOL(___rw_write_enter); #endif -/* Atomic operations. */ -EXPORT_SYMBOL(___atomic24_add); -EXPORT_SYMBOL(___atomic24_sub); - EXPORT_SYMBOL(__ashrdi3); EXPORT_SYMBOL(__ashldi3); EXPORT_SYMBOL(__lshrdi3); |