[PATCH 16/21] ramfs, hugetlbfs, mqueue: set DCACHE_DONTCACHE

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makes simple_lookup() slightly cheaper there.

Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
 fs/hugetlbfs/inode.c | 1 +
 fs/ramfs/inode.c     | 1 +
 ipc/mqueue.c         | 1 +
 3 files changed, 3 insertions(+)

diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 0fc179a59830..205dd7562be1 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -1431,6 +1431,7 @@ hugetlbfs_fill_super(struct super_block *sb, struct fs_context *fc)
 	sb->s_blocksize_bits = huge_page_shift(ctx->hstate);
 	sb->s_magic = HUGETLBFS_MAGIC;
 	sb->s_op = &hugetlbfs_ops;
+	sb->s_d_flags = DCACHE_DONTCACHE;
 	sb->s_time_gran = 1;
 
 	/*
diff --git a/fs/ramfs/inode.c b/fs/ramfs/inode.c
index 8006faaaf0ec..c4ee67870c4b 100644
--- a/fs/ramfs/inode.c
+++ b/fs/ramfs/inode.c
@@ -269,6 +269,7 @@ static int ramfs_fill_super(struct super_block *sb, struct fs_context *fc)
 	sb->s_blocksize_bits	= PAGE_SHIFT;
 	sb->s_magic		= RAMFS_MAGIC;
 	sb->s_op		= &ramfs_ops;
+	sb->s_d_flags		= DCACHE_DONTCACHE;
 	sb->s_time_gran		= 1;
 
 	inode = ramfs_get_inode(sb, NULL, S_IFDIR | fsi->mount_opts.mode, 0);
diff --git a/ipc/mqueue.c b/ipc/mqueue.c
index 35b4f8659904..dbd5c74eecb2 100644
--- a/ipc/mqueue.c
+++ b/ipc/mqueue.c
@@ -411,6 +411,7 @@ static int mqueue_fill_super(struct super_block *sb, struct fs_context *fc)
 	sb->s_blocksize_bits = PAGE_SHIFT;
 	sb->s_magic = MQUEUE_MAGIC;
 	sb->s_op = &mqueue_super_ops;
+	sb->s_d_flags = DCACHE_DONTCACHE;
 
 	inode = mqueue_get_inode(sb, ns, S_IFDIR | S_ISVTX | S_IRWXUGO, NULL);
 	if (IS_ERR(inode))
-- 
2.39.5





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