diff mbox series

[bpf-next,17/19] bpf: Remove migrate_{disable|enable} from bpf_local_storage_alloc()

Message ID 20250106081900.1665573-18-houtao@huaweicloud.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series [bpf-next,01/19] bpf: Remove migrate_{disable|enable} from LPM trie | expand

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Commit Message

Hou Tao Jan. 6, 2025, 8:18 a.m. UTC 
From: Hou Tao <houtao1@huawei.com>

These two callers of bpf_local_storage_alloc() are the same as
bpf_selem_alloc(): bpf_sk_storage_clone() and
bpf_local_storage_update(). The running contexts of these two callers
have already disabled migration, therefore, there is no need to add
extra migrate_{disable|enable} pair in bpf_local_storage_alloc(). Also
add a cant_migrate() check in bpf_local_storage_alloc() to ensure such
guarantee will not be broken.

Signed-off-by: Hou Tao <houtao1@huawei.com>
---
 kernel/bpf/bpf_local_storage.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)
diff mbox series

Patch

diff --git a/kernel/bpf/bpf_local_storage.c b/kernel/bpf/bpf_local_storage.c
index fd48a2a17ccd..0970766278f7 100644
--- a/kernel/bpf/bpf_local_storage.c
+++ b/kernel/bpf/bpf_local_storage.c
@@ -500,15 +500,13 @@  int bpf_local_storage_alloc(void *owner,
 	if (err)
 		return err;
 
-	if (smap->bpf_ma) {
-		migrate_disable();
+	cant_migrate();
+
+	if (smap->bpf_ma)
 		storage = bpf_mem_cache_alloc_flags(&smap->storage_ma, gfp_flags);
-		migrate_enable();
-	} else {
+	else
 		storage = bpf_map_kzalloc(&smap->map, sizeof(*storage),
 					  gfp_flags | __GFP_NOWARN);
-	}
-
 	if (!storage) {
 		err = -ENOMEM;
 		goto uncharge;