diff options
| author | Kees Cook <keescook@chromium.org> | 2018-11-01 14:08:07 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2018-12-03 16:52:35 -0800 |
| commit | b77fa617a2ff4d6beccad3d3d4b3a1f2d10368aa (patch) | |
| tree | 7c5c4003dc08ab456eb0a8fb05f05b6e5b320c74 /fs | |
| parent | bdabc8e71c8582cd61314f004b9a0283269585bb (diff) | |
| download | linux-b77fa617a2ff4d6beccad3d3d4b3a1f2d10368aa.tar.bz2 | |
pstore: Remove needless lock during console writes
Since the console writer does not use the preallocated crash dump buffer
any more, there is no reason to perform locking around it.
Fixes: 70ad35db3321 ("pstore: Convert console write to use ->write_buf")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/pstore/platform.c | 29 |
1 files changed, 6 insertions, 23 deletions
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 8b6028948cf3..a75756c48e10 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -462,31 +462,14 @@ static void pstore_unregister_kmsg(void) #ifdef CONFIG_PSTORE_CONSOLE static void pstore_console_write(struct console *con, const char *s, unsigned c) { - const char *e = s + c; + struct pstore_record record; - while (s < e) { - struct pstore_record record; - unsigned long flags; - - pstore_record_init(&record, psinfo); - record.type = PSTORE_TYPE_CONSOLE; - - if (c > psinfo->bufsize) - c = psinfo->bufsize; + pstore_record_init(&record, psinfo); + record.type = PSTORE_TYPE_CONSOLE; - if (oops_in_progress) { - if (!spin_trylock_irqsave(&psinfo->buf_lock, flags)) - break; - } else { - spin_lock_irqsave(&psinfo->buf_lock, flags); - } - record.buf = (char *)s; - record.size = c; - psinfo->write(&record); - spin_unlock_irqrestore(&psinfo->buf_lock, flags); - s += c; - c = e - s; - } + record.buf = (char *)s; + record.size = c; + psinfo->write(&record); } static struct console pstore_console = { |