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[PATCH] more for_each_cpu() conversions

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When we stop allocating percpu memory for not-possible CPUs we must not touch
the percpu data for not-possible CPUs at all.  The correct way of doing this
is to test cpu_possible() or to use for_each_cpu().

This patch is a kernel-wide sweep of all instances of NR_CPUS.  I found very
few instances of this bug, if any.  But the patch converts lots of open-coded
test to use the preferred helper macros.

Cc: Mikael Starvik <[email protected]>
Cc: David Howells <[email protected]>
Acked-by: Kyle McMartin <[email protected]>
Cc: Anton Blanchard <[email protected]>
Cc: Benjamin Herrenschmidt <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Martin Schwidefsky <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Paul Mundt <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: William Lee Irwin III <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Christian Zankel <[email protected]>
Cc: Philippe Elie <[email protected]>
Cc: Nathan Scott <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Eric Dumazet <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Andrew Morton 2006-03-23 03:01:05 -08:00 • committed by Linus Torvalds
commit 394e3902c5
42 changed files with 137 additions and 222 deletions
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7
include/asm-sparc64/percpu.h
View file

@ -26,10 +26,9 @@ register unsigned long __local_per_cpu_offset asm("g5");
#define percpu_modcopy(pcpudst, src, size) \
do { \
unsigned int __i; \
for (__i = 0; __i < NR_CPUS; __i++) \
if (cpu_possible(__i)) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
for_each_cpu(__i) \
memcpy((pcpudst)+__per_cpu_offset(__i), \
(src), (size)); \
} while (0)
#else /* ! SMP */