diff options
author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-09-08 20:50:12 -0400 |
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committer | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2011-09-28 02:37:20 -0400 |
commit | 4a7f340c6a75ec5fca23d9c80a59f3f28cc4a61e (patch) | |
tree | 3680ac96e1a2ab091e7d157b65b30ac15d41f4b9 /arch/x86 | |
parent | 61e2cd0acc248c14793cefd7e23e209be9e0b70d (diff) |
x86, ticketlock: remove obsolete comment
The note about partial registers is not really relevent now that we
rely on gcc to generate all the assembler.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/include/asm/spinlock.h | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/x86/include/asm/spinlock.h b/arch/x86/include/asm/spinlock.h index f5695eeb83ff..972c260919a3 100644 --- a/arch/x86/include/asm/spinlock.h +++ b/arch/x86/include/asm/spinlock.h | |||
@@ -49,10 +49,6 @@ | |||
49 | * issues and should be optimal for the uncontended case. Note the tail must be | 49 | * issues and should be optimal for the uncontended case. Note the tail must be |
50 | * in the high part, because a wide xadd increment of the low part would carry | 50 | * in the high part, because a wide xadd increment of the low part would carry |
51 | * up and contaminate the high part. | 51 | * up and contaminate the high part. |
52 | * | ||
53 | * With fewer than 2^8 possible CPUs, we can use x86's partial registers to | ||
54 | * save some instructions and make the code more elegant. There really isn't | ||
55 | * much between them in performance though, especially as locks are out of line. | ||
56 | */ | 52 | */ |
57 | static __always_inline void __ticket_spin_lock(arch_spinlock_t *lock) | 53 | static __always_inline void __ticket_spin_lock(arch_spinlock_t *lock) |
58 | { | 54 | { |