diff options
| author | Andrew Morton <akpm@osdl.org> | 2006-03-23 12:01:05 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-23 16:38:17 +0100 |
| commit | 394e3902c55e667945f6f1c2bdbc59842cce70f7 (patch) | |
| tree | f4bca0bdc0c291fda6f6949265aacec0669b9084 /drivers | |
| parent | [PATCH] Only allocate percpu data for possible CPUs (diff) | |
| download | linux-394e3902c55e667945f6f1c2bdbc59842cce70f7.tar.xz linux-394e3902c55e667945f6f1c2bdbc59842cce70f7.zip | |
[PATCH] more for_each_cpu() conversions
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 <starvik@axis.com>
Cc: David Howells <dhowells@redhat.com>
Acked-by: Kyle McMartin <kyle@parisc-linux.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Andi Kleen <ak@muc.de>
Cc: Christian Zankel <chris@zankel.net>
Cc: Philippe Elie <phil.el@wanadoo.fr>
Cc: Nathan Scott <nathans@sgi.com>
Cc: Jens Axboe <axboe@suse.de>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/loopback.c | 4 | ||||
| -rw-r--r-- | drivers/oprofile/cpu_buffer.c | 3 |
2 files changed, 2 insertions, 5 deletions
diff --git a/drivers/net/loopback.c b/drivers/net/loopback.c index 690a1aae0b34..0c13795dca38 100644 --- a/drivers/net/loopback.c +++ b/drivers/net/loopback.c @@ -172,11 +172,9 @@ static struct net_device_stats *get_stats(struct net_device *dev) memset(stats, 0, sizeof(struct net_device_stats)); - for (i=0; i < NR_CPUS; i++) { + for_each_cpu(i) { struct net_device_stats *lb_stats; - if (!cpu_possible(i)) - continue; lb_stats = &per_cpu(loopback_stats, i); stats->rx_bytes += lb_stats->rx_bytes; stats->tx_bytes += lb_stats->tx_bytes; diff --git a/drivers/oprofile/cpu_buffer.c b/drivers/oprofile/cpu_buffer.c index 78193e4bbdb5..330d3869b41e 100644 --- a/drivers/oprofile/cpu_buffer.c +++ b/drivers/oprofile/cpu_buffer.c @@ -38,9 +38,8 @@ void free_cpu_buffers(void) { int i; - for_each_online_cpu(i) { + for_each_online_cpu(i) vfree(cpu_buffer[i].buffer); - } } int alloc_cpu_buffers(void) |