From: Christoph Hellwig <hch@lst.de>
Date: Fri, 29 Jun 2007 00:57:58 +0000 (+1000)
Subject: [POWERPC] spusched: No preemption for nosched contexts
X-Git-Tag: v2.6.23-rc1~767^2^2~67
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=df09cf3e2cd597d373f3a6046df0e0a50881ea44;p=linux-2.6

[POWERPC] spusched: No preemption for nosched contexts

And last but not least we need to make sure the scheduler tick never
preempts a nosched context.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index a20e4e2885..7bb5229b1e 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -522,7 +522,12 @@ void spu_yield(struct spu_context *ctx)
 
 static void spusched_tick(struct spu_context *ctx)
 {
-	if (ctx->policy == SCHED_FIFO || --ctx->time_slice)
+	if (ctx->flags & SPU_CREATE_NOSCHED)
+		return;
+	if (ctx->policy == SCHED_FIFO)
+		return;
+
+	if (--ctx->time_slice)
 		return;
 
 	/*