[PATCH] smb: client: use GFP_KERNEL for DFS cache allocations

[Fredric Cover]

From: Fredric Cover <fredric.cover.lkernel@xxxxxxxxx>

In dfs_cache.c, the helper functions alloc_target(), setup_referral(),
and update_cache_entry_locked() currently utilize GFP_ATOMIC to
allocate memory.

However, all of these functions are executed in sleepable conditions.
Use GFP_KERNEL instead, to reduce the risk of allocation failure and
stop putting unnecessary pressure on emergency memory pools in
low-memory scenarios.

Signed-off-by: Fredric Cover <fredric.cover.lkernel@xxxxxxxxx>
---
Compile-tested only. I don't have any way to test DFS code.
---
 fs/smb/client/dfs_cache.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/fs/smb/client/dfs_cache.c b/fs/smb/client/dfs_cache.c
index 83f8cf2f8d2b..44409ba44e1d 100644
--- a/fs/smb/client/dfs_cache.c
+++ b/fs/smb/client/dfs_cache.c
@@ -363,10 +363,10 @@ static struct cache_dfs_tgt *alloc_target(const char *name, int path_consumed)
 {
 	struct cache_dfs_tgt *t;
 
-	t = kmalloc_obj(*t, GFP_ATOMIC);
+	t = kmalloc_obj(*t, GFP_KERNEL);
 	if (!t)
 		return ERR_PTR(-ENOMEM);
-	t->name = kstrdup(name, GFP_ATOMIC);
+	t->name = kstrdup(name, GFP_KERNEL);
 	if (!t->name) {
 		kfree(t);
 		return ERR_PTR(-ENOMEM);
@@ -626,7 +626,7 @@ static int update_cache_entry_locked(struct cache_entry *ce, const struct dfs_in
 
 	target = READ_ONCE(ce->tgthint);
 	if (target) {
-		th = kstrdup(target->name, GFP_ATOMIC);
+		th = kstrdup(target->name, GFP_KERNEL);
 		if (!th)
 			return -ENOMEM;
 	}
@@ -760,11 +760,11 @@ static int setup_referral(const char *path, struct cache_entry *ce,
 
 	memset(ref, 0, sizeof(*ref));
 
-	ref->path_name = kstrdup(path, GFP_ATOMIC);
+	ref->path_name = kstrdup(path, GFP_KERNEL);
 	if (!ref->path_name)
 		return -ENOMEM;
 
-	ref->node_name = kstrdup(target, GFP_ATOMIC);
+	ref->node_name = kstrdup(target, GFP_KERNEL);
 	if (!ref->node_name) {
 		rc = -ENOMEM;
 		goto err_free_path;
-- 
2.53.0