From: Omar Sandoval <osan...@fb.com>
kclist_add() is only called at init time, so there's no point in
grabbing any locks. We're also going to replace the rwlock with a rwsem,
which we don't want to try grabbing during early boot.
Signed-off-by: Omar Sandoval <osan...@fb.com>
---
fs/proc/kcore.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index e64ecb9f2720..afd1ff8c2d3f 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -62,6 +62,7 @@ static LIST_HEAD(kclist_head);
static DEFINE_RWLOCK(kclist_lock);
static int kcore_need_update = 1;
+/* This doesn't grab kclist_lock, so it should only be used at init time. */
void
kclist_add(struct kcore_list *new, void *addr, size_t size, int type)
{
@@ -69,9 +70,7 @@ kclist_add(struct kcore_list *new, void *addr, size_t size,
int type)
new->size = size;
new->type = type;
- write_lock(&kclist_lock);
list_add_tail(&new->list, &kclist_head);
- write_unlock(&kclist_lock);
}
static size_t get_kcore_size(int *nphdr, size_t *elf_buflen)
--
2.18.0
