diff options
Diffstat (limited to 'fs/pstore/platform.c')
| -rw-r--r-- | fs/pstore/platform.c | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 791743deedf1..588461bb2dd4 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -237,6 +237,14 @@ static void allocate_buf_for_compression(void) } +static void free_buf_for_compression(void) +{ + kfree(stream.workspace); + stream.workspace = NULL; + kfree(big_oops_buf); + big_oops_buf = NULL; +} + /* * Called when compression fails, since the printk buffer * would be fetched for compression calling it again when @@ -353,6 +361,19 @@ static struct kmsg_dumper pstore_dumper = { .dump = pstore_dump, }; +/* + * Register with kmsg_dump to save last part of console log on panic. + */ +static void pstore_register_kmsg(void) +{ + kmsg_dump_register(&pstore_dumper); +} + +static void pstore_unregister_kmsg(void) +{ + kmsg_dump_unregister(&pstore_dumper); +} + #ifdef CONFIG_PSTORE_CONSOLE static void pstore_console_write(struct console *con, const char *s, unsigned c) { @@ -390,8 +411,14 @@ static void pstore_register_console(void) { register_console(&pstore_console); } + +static void pstore_unregister_console(void) +{ + unregister_console(&pstore_console); +} #else static void pstore_register_console(void) {} +static void pstore_unregister_console(void) {} #endif static int pstore_write_compat(enum pstore_type_id type, @@ -410,8 +437,6 @@ static int pstore_write_compat(enum pstore_type_id type, * read function right away to populate the file system. If not * then the pstore mount code will call us later to fill out * the file system. - * - * Register with kmsg_dump to save last part of console log on panic. */ int pstore_register(struct pstore_info *psi) { @@ -442,7 +467,7 @@ int pstore_register(struct pstore_info *psi) if (pstore_is_mounted()) pstore_get_records(0); - kmsg_dump_register(&pstore_dumper); + pstore_register_kmsg(); if ((psi->flags & PSTORE_FLAGS_FRAGILE) == 0) { pstore_register_console(); @@ -462,12 +487,28 @@ int pstore_register(struct pstore_info *psi) */ backend = psi->name; + module_put(owner); + pr_info("Registered %s as persistent store backend\n", psi->name); return 0; } EXPORT_SYMBOL_GPL(pstore_register); +void pstore_unregister(struct pstore_info *psi) +{ + pstore_unregister_pmsg(); + pstore_unregister_ftrace(); + pstore_unregister_console(); + pstore_unregister_kmsg(); + + free_buf_for_compression(); + + psinfo = NULL; + backend = NULL; +} +EXPORT_SYMBOL_GPL(pstore_unregister); + /* * Read all the records from the persistent store. Create * files in our filesystem. Don't warn about -EEXIST errors |