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| author | Srikar Dronamraju <srikar@linux.vnet.ibm.com> | 2012-06-01 11:19:50 +0200 |
|---|---|---|
| committer | Oleg Nesterov <oleg@redhat.com> | 2012-08-28 18:21:15 +0200 |
| commit | 61e1d394984110e2e76f25572d5b1b5d48796751 (patch) | |
| tree | e189b458a639d23986c0ebe0f2c52879b2a324a3 /kernel/events/uprobes.c | |
| parent | Merge branch 'perf/urgent' into perf/core (diff) | |
| download | linux-61e1d394984110e2e76f25572d5b1b5d48796751.tar.xz linux-61e1d394984110e2e76f25572d5b1b5d48796751.zip | |
uprobes: Remove redundant lock_page/unlock_page
Since read_opcode() reads from the referenced page and doesnt modify
the page contents nor the page attributes, there is no need to lock
the page.
Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Diffstat (limited to '')
| -rw-r--r-- | kernel/events/uprobes.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index c08a22d02f72..7cff24c60dd7 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -280,12 +280,10 @@ static int read_opcode(struct mm_struct *mm, unsigned long vaddr, uprobe_opcode_ if (ret <= 0) return ret; - lock_page(page); vaddr_new = kmap_atomic(page); vaddr &= ~PAGE_MASK; memcpy(opcode, vaddr_new + vaddr, UPROBE_SWBP_INSN_SIZE); kunmap_atomic(vaddr_new); - unlock_page(page); put_page(page); |