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[PATCH] percpu data: only iterate over possible CPUs

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percpu_data blindly allocates bootmem memory to store NR_CPUS instances of
cpudata, instead of allocating memory only for possible cpus.

As a preparation for changing that, we need to convert various 0 -> NR_CPUS
loops to use for_each_cpu().

(The above only applies to users of asm-generic/percpu.h.  powerpc has gone it
alone and is presently only allocating memory for present CPUs, so it's
currently corrupting memory).

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: James Bottomley <James.Bottomley@steeleye.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Cc: Jens Axboe <axboe@suse.de>
Cc: Anton Blanchard <anton@samba.org>
Acked-by: William Irwin <wli@holomorphy.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric Dumazet 2006-02-04 23:27:36 -08:00 • committed by Linus Torvalds
parent cef5076987
commit 88a2a4ac6b
11 changed files with 17 additions and 16 deletions
Download patch file Download diff file Expand all files Collapse all files

4
net/core/utils.c
View file

@ -121,7 +121,7 @@ void __init net_random_init(void)
{
int i;
for (i = 0; i < NR_CPUS; i++) {
for_each_cpu(i) {
struct nrnd_state *state = &per_cpu(net_rand_state,i);
__net_srandom(state, i+jiffies);
}
@ -133,7 +133,7 @@ static int net_random_reseed(void)
unsigned long seed[NR_CPUS];
get_random_bytes(seed, sizeof(seed));
for (i = 0; i < NR_CPUS; i++) {
for_each_cpu(i) {
struct nrnd_state *state = &per_cpu(net_rand_state,i);
__net_srandom(state, seed[i]);
}