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nfs: Replace kmap() with kmap_local_page()

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The use of kmap() is being deprecated in favor of kmap_local_page().

With kmap_local_page(), the mapping is per thread, CPU local and not
globally visible. Furthermore, the mapping can be acquired from any context
(including interrupts).

Therefore, use kmap_local_page() in nfs_do_filldir() because this mapping
is per thread, CPU local, and not globally visible.

Suggested-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
Fabio M. De Francesco 2022-06-28 20:24:26 +02:00 committed by Trond Myklebust
parent 064109db53
commit c77c738c37
1 changed files with 2 additions and 2 deletions
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4
fs/nfs/dir.c
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@ -1084,7 +1084,7 @@ static void nfs_do_filldir(struct nfs_readdir_descriptor *desc,
struct nfs_cache_array *array;
unsigned int i;
array = kmap(desc->page);
array = kmap_local_page(desc->page);
for (i = desc->cache_entry_index; i < array->size; i++) {
struct nfs_cache_array_entry *ent;
@ -1110,7 +1110,7 @@ static void nfs_do_filldir(struct nfs_readdir_descriptor *desc,
if (array->page_is_eof)
desc->eof = !desc->eob;
kunmap(desc->page);
kunmap_local(array);
dfprintk(DIRCACHE, "NFS: nfs_do_filldir() filling ended @ cookie %llu\n",
(unsigned long long)desc->dir_cookie);
}