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pstore: add pstore unregister

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pstore doesn't support unregistering yet. It was marked as TODO.
This patch adds some code to fix it:
 1) Add functions to unregister kmsg/console/ftrace/pmsg.
 2) Add a function to free compression buffer.
 3) Unmap the memory and free it.
 4) Add a function to unregister pstore filesystem.

Signed-off-by: Geliang Tang <geliangtang@163.com>
Acked-by: Kees Cook <keescook@chromium.org>
[Removed __exit annotation from ramoops_remove(). Reported by Arnd Bergmann]
Signed-off-by: Tony Luck <tony.luck@intel.com>
This commit is contained in:
Geliang Tang
2015-10-20 00:39:03 -07:00
committed by Tony Luck
parent 1873041152
commit ee1d267423
10 changed files with 88 additions and 34 deletions
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14
include/linux/pstore.h
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@@ -75,20 +75,8 @@ struct pstore_info {
#define PSTORE_FLAGS_FRAGILE 1
#ifdef CONFIG_PSTORE
extern int pstore_register(struct pstore_info *);
extern void pstore_unregister(struct pstore_info *);
extern bool pstore_cannot_block_path(enum kmsg_dump_reason reason);
#else
static inline int
pstore_register(struct pstore_info *psi)
{
return -ENODEV;
}
static inline bool
pstore_cannot_block_path(enum kmsg_dump_reason reason)
{
return false;
}
#endif
#endif /*_LINUX_PSTORE_H*/