Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=390c53430498c9973e015432806edd53b2efe6c6
Commit: 390c53430498c9973e015432806edd53b2efe6c6
Parent: e097b513285e616215b23af234d127298bb8d89a
Author: Arnd Bergmann <[EMAIL PROTECTED]>
AuthorDate: Mon Apr 23 21:08:10 2007 +0200
Committer: Arnd Bergmann <[EMAIL PROTECTED]>
CommitDate: Mon Apr 23 21:18:54 2007 +0200
[POWERPC] spufs: add memory barriers after set_bit
set_bit does not guarantee ordering on powerpc, so using it
for communication between threads requires explicit
mb() calls.
Signed-off-by: Arnd Bergmann <[EMAIL PROTECTED]>
---
arch/powerpc/platforms/cell/spufs/sched.c | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c
b/arch/powerpc/platforms/cell/spufs/sched.c
index 405a055..1582d76 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -76,6 +76,7 @@ void spu_start_tick(struct spu_context *ctx)
* Make sure the exiting bit is cleared.
*/
clear_bit(SPU_SCHED_EXITING, &ctx->sched_flags);
+ mb();
queue_delayed_work(spu_sched_wq, &ctx->sched_work,
SPU_TIMESLICE);
}
}
@@ -88,6 +89,7 @@ void spu_stop_tick(struct spu_context *ctx)
* makes sure it does not rearm itself anymore.
*/
set_bit(SPU_SCHED_EXITING, &ctx->sched_flags);
+ mb();
cancel_delayed_work(&ctx->sched_work);
}
}
@@ -239,6 +241,7 @@ static void spu_add_to_rq(struct spu_context *ctx)
spin_lock(&spu_prio->runq_lock);
list_add_tail(&ctx->rq, &spu_prio->runq[ctx->prio]);
set_bit(ctx->prio, spu_prio->bitmap);
+ mb();
spin_unlock(&spu_prio->runq_lock);
}
-
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