From 381b872cf7942ab8c95de156ce403bd906f3915d Mon Sep 17 00:00:00 2001 From: Seiji Aguchi Date: Fri, 16 Mar 2012 15:36:59 -0700 Subject: [PATCH] pstore: Introduce get_reason_str() to pstore Recently, there has been some changes in kmsg_dump() below and they have been applied to linus-tree. (1) kmsg_dump(KMSG_DUMP_KEXEC) was removed. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=a3dd3323058d281abd584b15ad4c5b65064d7a61 (2) The order of "enum kmsg_dump_reason" was modified. http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commitdiff;h=c22ab332902333f83766017478c1ef6607ace681 Replace the fragile reason_str array with a more robust solution that will not be broken by future re-arrangements of the enum values. Signed-off-by: Seiji Aguchi Signed-off-by: Adrian Hunter Acked-by: Don Zickus Link: https://lkml.org/lkml/2012/3/16/417 Signed-off-by: Tony Luck --- fs/pstore/platform.c | 30 ++++++++++++++++++++++-------- 1 file changed, 22 insertions(+), 8 deletions(-) diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c index 9ec22d3b4293..82c585f715e3 100644 --- a/fs/pstore/platform.c +++ b/fs/pstore/platform.c @@ -68,9 +68,25 @@ void pstore_set_kmsg_bytes(int bytes) /* Tag each group of saved records with a sequence number */ static int oopscount; -static char *reason_str[] = { - "Oops", "Panic", "Kexec", "Restart", "Halt", "Poweroff", "Emergency" -}; +static const char *get_reason_str(enum kmsg_dump_reason reason) +{ + switch (reason) { + case KMSG_DUMP_PANIC: + return "Panic"; + case KMSG_DUMP_OOPS: + return "Oops"; + case KMSG_DUMP_EMERG: + return "Emergency"; + case KMSG_DUMP_RESTART: + return "Restart"; + case KMSG_DUMP_HALT: + return "Halt"; + case KMSG_DUMP_POWEROFF: + return "Poweroff"; + default: + return "Unknown"; + } +} /* * callback from kmsg_dump. (s2,l2) has the most recently @@ -85,17 +101,15 @@ static void pstore_dump(struct kmsg_dumper *dumper, unsigned long s1_start, s2_start; unsigned long l1_cpy, l2_cpy; unsigned long size, total = 0; - char *dst, *why; + char *dst; + const char *why; u64 id; int hsize, ret; unsigned int part = 1; unsigned long flags = 0; int is_locked = 0; - if (reason < ARRAY_SIZE(reason_str)) - why = reason_str[reason]; - else - why = "Unknown"; + why = get_reason_str(reason); if (in_nmi()) { is_locked = spin_trylock(&psinfo->buf_lock);