The patch titled
s390: exploit rcu_needs_cpu() interface
has been added to the -mm tree. Its filename is
s390-exploit-rcu_needs_cpu-interface.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Exploit rcu_needs_cpu() interface to keep the cpu 'ticking' if necessary.
Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
arch/s390/kernel/time.c | 7 ++++---
1 files changed, 4 insertions(+), 3 deletions(-)
diff -puN arch/s390/kernel/time.c~s390-exploit-rcu_needs_cpu-interface arch/s390/kernel/time.c
--- 25/arch/s390/kernel/time.c~s390-exploit-rcu_needs_cpu-interface Wed Apr 26 14:12:24 2006
+++ 25-akpm/arch/s390/kernel/time.c Wed Apr 26 14:12:24 2006
@@ -249,18 +249,19 @@ static inline void stop_hz_timer(void)
unsigned long flags;
unsigned long seq, next;
__u64 timer, todval;
+ int cpu = smp_processor_id();
if (sysctl_hz_timer != 0)
return;
- cpu_set(smp_processor_id(), nohz_cpu_mask);
+ cpu_set(cpu, nohz_cpu_mask);
/*
* Leave the clock comparator set up for the next timer
* tick if either rcu or a softirq is pending.
*/
- if (rcu_pending(smp_processor_id()) || local_softirq_pending()) {
- cpu_clear(smp_processor_id(), nohz_cpu_mask);
+ if (rcu_needs_cpu(cpu) || local_softirq_pending()) {
+ cpu_clear(cpu, nohz_cpu_mask);
return;
}
_
Patches currently in -mm which might be from heiko.carstens@xxxxxxxxxx are
s390-make-qeth-buildable.patch
ipv4-inet_init-fs_initcall.patch
s390-bug-in-setup_rt_frame.patch
s390-instruction-processing-damage-handling.patch
rcu-introduce-rcu_needs_cpu-interface.patch
s390-exploit-rcu_needs_cpu-interface.patch
-
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