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pstore: fix pstore filesystem mount/remount issue

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Currently after mount/remount operation on pstore filesystem,
the content on pstore will be lost. It is because current ERST
implementation doesn't support multi-user usage, which moves
internal pointer to the end after accessing it. Adding
multi-user support for pstore usage.

Signed-off-by: Chen Gong <gong.chen@linux.intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Chen Gong 2011-05-16 11:00:27 -07:00 • committed by Tony Luck
parent 8d38d74b64
commit 06cf91b4b4
3 changed files with 44 additions and 14 deletions
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2
include/linux/pstore.h
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@ -35,6 +35,8 @@ struct pstore_info {
struct mutex buf_mutex; /* serialize access to 'buf' */
char *buf;
size_t bufsize;
int (*open)(struct pstore_info *psi);
int (*close)(struct pstore_info *psi);
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
struct timespec *time);
u64 (*write)(enum pstore_type_id type, size_t size);