xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

pstore: Don't allow high traffic options on fragile devices

Browse Source 
Some pstore backing devices use on board flash as persistent
storage. These have limited numbers of write cycles so it
is a poor idea to use them from high frequency operations.

Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Luck, Tony
2013-12-18 15:17:10 -08:00
committed by Linus Torvalds
parent eaadcfeb31
commit df36ac1bc2
4 changed files with 10 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
include/linux/pstore.h
View File

@@ -51,6 +51,7 @@ struct pstore_info {
char *buf;
size_t bufsize;
struct mutex read_mutex; /* serialize open/read/close */
int flags;
int (*open)(struct pstore_info *psi);
int (*close)(struct pstore_info *psi);
ssize_t (*read)(u64 *id, enum pstore_type_id *type,
@@ -70,6 +71,8 @@ struct pstore_info {
void *data;
};
#define PSTORE_FLAGS_FRAGILE 1
#ifdef CONFIG_PSTORE
extern int pstore_register(struct pstore_info *);
extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason);