commit f15f41383d466860f8b22f669da8c841f8d73c3b
author Linus Torvalds <torvalds@woody.linux-foundation.org> Wed Sep 19 11:38:25 2007 -0700
committer Linus Torvalds <torvalds@woody.linux-foundation.org> Wed Sep 19 11:38:25 2007 -0700
tree 527f4d443832deb11e592d6a7f33edd4b726b1ac
parent dbe3ed1c078c193be34326728d494c5c4bc115e2
parent c27da339698145a9383e052c1070a950d30da478

Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc:
  [POWERPC] Fix timekeeping on PowerPC 601
  [POWERPC] Don't expose clock vDSO functions when CPU has no timebase
  [POWERPC] spusched: Fix null pointer dereference in find_victim

arch/powerpc/kernel/time.c

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 727a669..c627cf8 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -239,7 +239,7 @@
 	struct cpu_purr_data *p = &__get_cpu_var(cpu_purr_data);
 
 	local_irq_save(flags);
-	p->tb = mftb();
+	p->tb = get_tb_or_rtc();
 	p->purr = mfspr(SPRN_PURR);
 	wmb();
 	p->initialized = 1;
@@ -317,7 +317,7 @@
  */
 void snapshot_timebase(void)
 {
-	__get_cpu_var(last_jiffy) = get_tb();
+	__get_cpu_var(last_jiffy) = get_tb_or_rtc();
 	snapshot_purr();
 }
 
@@ -684,6 +684,8 @@
 
 		write_seqlock(&xtime_lock);
 		tb_next_jiffy = tb_last_jiffy + tb_ticks_per_jiffy;
+		if (__USE_RTC() && tb_next_jiffy >= 1000000000)
+			tb_next_jiffy -= 1000000000;
 		if (per_cpu(last_jiffy, cpu) >= tb_next_jiffy) {
 			tb_last_jiffy = tb_next_jiffy;
 			do_timer(1);
@@ -977,7 +979,7 @@
 	tb_to_ns_scale = scale;
 	tb_to_ns_shift = shift;
 	/* Save the current timebase to pretty up CONFIG_PRINTK_TIME */
-	boot_tb = get_tb();
+	boot_tb = get_tb_or_rtc();
 
 	tm = get_boot_time();
 

arch/powerpc/kernel/vdso.c

diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index cef01e4..213fa31 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -98,6 +98,18 @@
 		CPU_FTR_USE_TB, 0,
 		"__kernel_gettimeofday", NULL
 	},
+	{
+		CPU_FTR_USE_TB, 0,
+		"__kernel_clock_gettime", NULL
+	},
+	{
+		CPU_FTR_USE_TB, 0,
+		"__kernel_clock_getres", NULL
+	},
+	{
+		CPU_FTR_USE_TB, 0,
+		"__kernel_get_tbfreq", NULL
+	},
 };
 
 /*

arch/powerpc/platforms/cell/spufs/sched.c

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index c784edd..5bebe7f 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -579,7 +579,7 @@
 		list_for_each_entry(spu, &cbe_spu_info[node].spus, cbe_list) {
 			struct spu_context *tmp = spu->ctx;
 
-			if (tmp->prio > ctx->prio &&
+			if (tmp && tmp->prio > ctx->prio &&
 			    (!victim || tmp->prio > victim->prio))
 				victim = spu->ctx;
 		}
@@ -611,9 +611,9 @@
 
 			mutex_lock(&cbe_spu_info[node].list_mutex);
 			cbe_spu_info[node].nr_active--;
+			spu_unbind_context(spu, victim);
 			mutex_unlock(&cbe_spu_info[node].list_mutex);
 
-			spu_unbind_context(spu, victim);
 			victim->stats.invol_ctx_switch++;
 			spu->stats.invol_ctx_switch++;
 			mutex_unlock(&victim->state_mutex);

include/asm-powerpc/time.h

diff --git a/include/asm-powerpc/time.h b/include/asm-powerpc/time.h
index d7f5ddf..c104c15 100644
--- a/include/asm-powerpc/time.h
+++ b/include/asm-powerpc/time.h
@@ -149,6 +149,11 @@
 }
 #endif /* !CONFIG_PPC64 */
 
+static inline u64 get_tb_or_rtc(void)
+{
+	return __USE_RTC() ? get_rtc() : get_tb();
+}
+
 static inline void set_tb(unsigned int upper, unsigned int lower)
 {
 	mtspr(SPRN_TBWL, 0);