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authorHeiko Carstens <heiko.carstens@de.ibm.com>2011-05-23 10:24:49 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2011-05-23 10:24:32 +0200
commit5f420c5bd15c948302aafd3341903bc06895f1bb (patch)
tree9cf1f1e25ca63d35cfe28255e1ff395d06d5ab17 /arch/s390/oprofile
parentfcdd65b0e7bbbd6aef9be2f20e7c238759cf0b41 (diff)
downloadlinux-linaro-stable-5f420c5bd15c948302aafd3341903bc06895f1bb.tar.gz
[S390] oprofile: dont access lowcore
The external interrupt parameter is passed as function call parameter. No need to access lowcore. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/oprofile')
-rw-r--r--arch/s390/oprofile/hwsampler.c11
1 files changed, 2 insertions, 9 deletions
diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c
index cb4338ccbf7b..053caa0fd276 100644
--- a/arch/s390/oprofile/hwsampler.c
+++ b/arch/s390/oprofile/hwsampler.c
@@ -675,18 +675,11 @@ int hwsampler_activate(unsigned int cpu)
static void hws_ext_handler(unsigned int ext_int_code,
unsigned int param32, unsigned long param64)
{
- int cpu;
struct hws_cpu_buffer *cb;
kstat_cpu(smp_processor_id()).irqs[EXTINT_CPM]++;
- cpu = smp_processor_id();
- cb = &per_cpu(sampler_cpu_buffer, cpu);
-
- atomic_xchg(
- &cb->ext_params,
- atomic_read(&cb->ext_params)
- | S390_lowcore.ext_params);
-
+ cb = &__get_cpu_var(sampler_cpu_buffer);
+ atomic_xchg(&cb->ext_params, atomic_read(&cb->ext_params) | param32);
if (hws_wq)
queue_work(hws_wq, &cb->worker);
}