diff options
| author |   Namhyung Kim <namhyung@kernel.org> | 2016-05-18 21:00:05 +0900 |
|---|---|---|
| committer |   Kees Cook <keescook@chromium.org> | 2016-05-31 12:36:44 -0700 |
| commit | 98e44fda2ea19c0e8b0a2e0e4dcd3461251f09ea (patch) | |
| tree | e467d0b5acdc426d6c1aa4354f12644fb5f453f8 /fs/pstore/platform.c | |
| parent | ramoops: Only unregister when registered (diff) | |
| download | linux-dev-98e44fda2ea19c0e8b0a2e0e4dcd3461251f09ea.tar.xz linux-dev-98e44fda2ea19c0e8b0a2e0e4dcd3461251f09ea.zip | |
pstore: Enable compression on normal path (again)
The commit f0e2efcfd2717 ("pstore: do not use message compression
without lock") added a check to 'is_locked' to avoid breakage in
concurrent accesses. But it has a side-effect of disabling compression
on normal path since 'is_locked' variable is not set. As normal path
always takes the lock, it should be initialized to 1.
This also makes the unlock code a bit simpler.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'fs/pstore/platform.c')
| -rw-r--r-- | fs/pstore/platform.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index e8c17afdfb41..ad8ef2298047 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -284,7 +284,7 @@ static void pstore_dump(struct kmsg_dumper *dumper, u64 id; unsigned int part = 1; unsigned long flags = 0; - int is_locked = 0; + int is_locked; int ret; why = get_reason_str(reason); @@ -295,8 +295,10 @@ static void pstore_dump(struct kmsg_dumper *dumper, pr_err("pstore dump routine blocked in %s path, may corrupt error record\n" , in_nmi() ? "NMI" : why); } - } else + } else { spin_lock_irqsave(&psinfo->buf_lock, flags); + is_locked = 1; + } oopscount++; while (total < kmsg_bytes) { char *dst; @@ -350,10 +352,7 @@ static void pstore_dump(struct kmsg_dumper *dumper, total += total_len; part++; } - if (pstore_cannot_block_path(reason)) { - if (is_locked) - spin_unlock_irqrestore(&psinfo->buf_lock, flags); - } else + if (is_locked) spin_unlock_irqrestore(&psinfo->buf_lock, flags); } |