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| author | Ashok Raj <ashok.raj@intel.com> | 2005-09-07 02:16:18 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-08 03:57:16 +0400 |
| commit | 0c2b9d5c035f5a82c9c4ba717984d04838a0701e (patch) | |
| tree | 0c01a7e7ee5f00cc309a04a51e4fc9a6d2e3ff33 | |
| parent | 19aaabb5841439988fc357f90d5c59d28fa84658 (diff) | |
| download | linux-0c2b9d5c035f5a82c9c4ba717984d04838a0701e.tar.xz | |
[PATCH] x86_64: Fix cluster mode send_IPI_allbutself to use get_cpu()/put_cpu()
Need to ensure we dont get prempted when we clear ourself from mask when using
clustered mode genapic code.
Signed-off-by: Ashok Raj <ashok.raj@intel.com>
Acked-by: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | arch/x86_64/kernel/genapic_cluster.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86_64/kernel/genapic_cluster.c b/arch/x86_64/kernel/genapic_cluster.c index 9703da7202e3..f6523dd1bc09 100644 --- a/arch/x86_64/kernel/genapic_cluster.c +++ b/arch/x86_64/kernel/genapic_cluster.c @@ -72,10 +72,14 @@ static void cluster_send_IPI_mask(cpumask_t mask, int vector) static void cluster_send_IPI_allbutself(int vector) { cpumask_t mask = cpu_online_map; - cpu_clear(smp_processor_id(), mask); + int me = get_cpu(); /* Ensure we are not preempted when we clear */ + + cpu_clear(me, mask); if (!cpus_empty(mask)) cluster_send_IPI_mask(mask, vector); + + put_cpu(); } static void cluster_send_IPI_all(int vector) |