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| author | Dmitry Torokhov <dtor@insightbb.com> | 2006-12-08 01:07:56 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dtor@insightbb.com> | 2006-12-08 01:07:56 -0500 |
| commit | bef986502fa398b1785a3979b1aa17cd902d3527 (patch) | |
| tree | b59c1afe7b1dfcc001b86e54863f550d7ddc8c34 /include/asm-x86_64/pda.h | |
| parent | 4bdbd2807deeccc0793d57fb5120d7a53f2c0b3c (diff) | |
| parent | c99767974ebd2a719d849fdeaaa1674456f5283f (diff) | |
Merge rsync://rsync.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
drivers/usb/input/hid.h
Diffstat (limited to 'include/asm-x86_64/pda.h')
| -rw-r--r-- | include/asm-x86_64/pda.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-x86_64/pda.h b/include/asm-x86_64/pda.h index 14996d962ba..5642634843c 100644 --- a/include/asm-x86_64/pda.h +++ b/include/asm-x86_64/pda.h @@ -109,6 +109,15 @@ extern struct x8664_pda _proxy_pda; #define sub_pda(field,val) pda_to_op("sub",field,val) #define or_pda(field,val) pda_to_op("or",field,val) +/* This is not atomic against other CPUs -- CPU preemption needs to be off */ +#define test_and_clear_bit_pda(bit,field) ({ \ + int old__; \ + asm volatile("btr %2,%%gs:%c3\n\tsbbl %0,%0" \ + : "=r" (old__), "+m" (_proxy_pda.field) \ + : "dIr" (bit), "i" (pda_offset(field)) : "memory"); \ + old__; \ +}) + #endif #define PDA_STACKOFFSET (5*8) |