diff options
| -rw-r--r-- | arch/powerpc/platforms/pseries/nvram.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/nvram.c b/arch/powerpc/platforms/pseries/nvram.c index a76b228..330a57b 100644 --- a/arch/powerpc/platforms/pseries/nvram.c +++ b/arch/powerpc/platforms/pseries/nvram.c @@ -625,6 +625,8 @@ static void oops_to_nvram(struct kmsg_dumper *dumper, { static unsigned int oops_count = 0; static bool panicking = false; + static DEFINE_SPINLOCK(lock); + unsigned long flags; size_t text_len; unsigned int err_type = ERR_TYPE_KERNEL_PANIC_GZ; int rc = -1; @@ -655,6 +657,9 @@ static void oops_to_nvram(struct kmsg_dumper *dumper, if (clobbering_unread_rtas_event()) return; + if (!spin_trylock_irqsave(&lock, flags)) + return; + if (big_oops_buf) { text_len = capture_last_msgs(old_msgs, old_len, new_msgs, new_len, big_oops_buf, big_oops_buf_sz); @@ -670,4 +675,6 @@ static void oops_to_nvram(struct kmsg_dumper *dumper, (void) nvram_write_os_partition(&oops_log_partition, oops_buf, (int) (sizeof(*oops_len) + *oops_len), err_type, ++oops_count); + + spin_unlock_irqrestore(&lock, flags); } |