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| author | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-07-10 02:10:41 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-07-17 19:05:52 +0200 |
| commit | 060287b8c467bf49a594d8d669e1986c6d8d76b0 (patch) | |
| tree | f869d1cc6d09875a0dc4f42b230f144617fc3bfc /fs/pstore/platform.c | |
| parent | pstore: Introduce write_buf backend callback (diff) | |
| download | linux-060287b8c467bf49a594d8d669e1986c6d8d76b0.tar.xz linux-060287b8c467bf49a594d8d669e1986c6d8d76b0.zip | |
pstore: Add persistent function tracing
With this support kernel can save function call chain log into a
persistent ram buffer that can be decoded and dumped after reboot
through pstore filesystem. It can be used to determine what function
was last called before a reset or panic.
We store the log in a binary format and then decode it at read time.
p.s.
Mostly the code comes from trace_persistent.c driver found in the
Android git tree, written by Colin Cross <ccross@android.com>
(according to sign-off history). I reworked the driver a little bit,
and ported it to pstore.
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/pstore/platform.c')
| -rw-r--r-- | fs/pstore/platform.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index ef5ca8a0255c..29996e8793a7 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -61,7 +61,7 @@ static DECLARE_WORK(pstore_work, pstore_dowork); * calls to pstore_register() */ static DEFINE_SPINLOCK(pstore_lock); -static struct pstore_info *psinfo; +struct pstore_info *psinfo; static char *backend; |