mmc: block: fix debugfs_simple_attr.cocci warnings

Use DEFINE_DEBUGFS_ATTRIBUTE rather than DEFINE_SIMPLE_ATTRIBUTE
for debugfs files.

Semantic patch information:
Rationale: DEFINE_SIMPLE_ATTRIBUTE + debugfs_create_file()
imposes some significant overhead as compared to
DEFINE_DEBUGFS_ATTRIBUTE + debugfs_create_file_unsafe().

Generated by: scripts/coccinelle/api/debugfs/debugfs_simple_attr.cocci

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/core/block.c b/drivers/mmc/core/block.c
index 14f3fdb..dc55bdf 100644 (file)
--- a/drivers/mmc/core/block.c
+++ b/drivers/mmc/core/block.c
@@ -2774,8 +2774,8 @@ static int mmc_dbg_card_status_get(void *data, u64 *val)
 
        return ret;
 }
-DEFINE_SIMPLE_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
-               NULL, "%08llx\n");
+DEFINE_DEBUGFS_ATTRIBUTE(mmc_dbg_card_status_fops, mmc_dbg_card_status_get,
+                        NULL, "%08llx\n");
 
 /* That is two digits * 512 + 1 for newline */
 #define EXT_CSD_STR_LEN 1025
@@ -2863,8 +2863,9 @@ static int mmc_blk_add_debugfs(struct mmc_card *card, struct mmc_blk_data *md)
 
        if (mmc_card_mmc(card) || mmc_card_sd(card)) {
                md->status_dentry =
-                       debugfs_create_file("status", S_IRUSR, root, card,
-                                           &mmc_dbg_card_status_fops);
+                       debugfs_create_file_unsafe("status", 0400, root,
+                                                  card,
+                                                  &mmc_dbg_card_status_fops);
                if (!md->status_dentry)
                        return -EIO;
        }