Commit-ID: 559faa6be143b8aa7a07b12f618d29fbc1c8eb0d
Gitweb: http://git.kernel.org/tip/559faa6be143b8aa7a07b12f618d29fbc1c8eb0d
Author: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
AuthorDate: Wed, 8 Jun 2011 11:00:08 +0900
Committer: Borislav Petkov <borislav.petkov@xxxxxxx>
CommitDate: Thu, 16 Jun 2011 12:10:13 +0200
x86, mce: Cleanup mce_read()
Use a temporary local variable m to simplify the code. No change in
logic.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
Acked-by: Tony Luck <tony.luck@xxxxxxxxx>
Link: http://lkml.kernel.org/r/4DEED7A8.8020307@xxxxxxxxxxxxxx
Signed-off-by: Borislav Petkov <borislav.petkov@xxxxxxx>
---
arch/x86/kernel/cpu/mcheck/mce.c | 23 +++++++++++------------
1 files changed, 11 insertions(+), 12 deletions(-)
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index f3f648c..54360e8 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1537,19 +1537,18 @@ static ssize_t mce_read(struct file *filp, char __user *ubuf, size_t usize,
do {
for (i = prev; i < next; i++) {
unsigned long start = jiffies;
+ struct mce *m = &mcelog.entry[i];
- while (!mcelog.entry[i].finished) {
+ while (!m->finished) {
if (time_after_eq(jiffies, start + 2)) {
- memset(mcelog.entry + i, 0,
- sizeof(struct mce));
+ memset(m, 0, sizeof(*m));
goto timeout;
}
cpu_relax();
}
smp_rmb();
- err |= copy_to_user(buf, mcelog.entry + i,
- sizeof(struct mce));
- buf += sizeof(struct mce);
+ err |= copy_to_user(buf, m, sizeof(*m));
+ buf += sizeof(*m);
timeout:
;
}
@@ -1569,13 +1568,13 @@ timeout:
on_each_cpu(collect_tscs, cpu_tsc, 1);
for (i = next; i < MCE_LOG_LEN; i++) {
- if (mcelog.entry[i].finished &&
- mcelog.entry[i].tsc < cpu_tsc[mcelog.entry[i].cpu]) {
- err |= copy_to_user(buf, mcelog.entry+i,
- sizeof(struct mce));
+ struct mce *m = &mcelog.entry[i];
+
+ if (m->finished && m->tsc < cpu_tsc[m->cpu]) {
+ err |= copy_to_user(buf, m, sizeof(*m));
smp_rmb();
- buf += sizeof(struct mce);
- memset(&mcelog.entry[i], 0, sizeof(struct mce));
+ buf += sizeof(*m);
+ memset(m, 0, sizeof(*m));
}
}
--
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