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nfs: pass the correct prototype to read_cache_page

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Fix the callbacks NFS passes to read_cache_page to actually have the
proper type expected.  Casting around function pointers can easily
hide typing bugs, and defeats control flow protection.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Christoph Hellwig 2019-05-01 12:06:35 -04:00 committed by Anna Schumaker
parent 8ca017c8ce
commit a46126ccc7
2 changed files with 8 additions and 6 deletions
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7
fs/nfs/dir.c
View File

@ -714,8 +714,9 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page,
* We only need to convert from xdr once so future lookups are much simpler * We only need to convert from xdr once so future lookups are much simpler
*/ */
static static
int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page) int nfs_readdir_filler(void *data, struct page* page)
{ {
nfs_readdir_descriptor_t *desc = data;
struct inode *inode = file_inode(desc->file); struct inode *inode = file_inode(desc->file);
int ret; int ret;
@ -762,8 +763,8 @@ void cache_page_release(nfs_readdir_descriptor_t *desc)
static static
struct page *get_cache_page(nfs_readdir_descriptor_t *desc) struct page *get_cache_page(nfs_readdir_descriptor_t *desc)
{ {
return read_cache_page(desc->file->f_mapping, return read_cache_page(desc->file->f_mapping, desc->page_index,
desc->page_index, (filler_t *)nfs_readdir_filler, desc); nfs_readdir_filler, desc);
} }
/* /*

7
fs/nfs/symlink.c
View File

@ -26,8 +26,9 @@
* and straight-forward than readdir caching. * and straight-forward than readdir caching.
*/ */
static int nfs_symlink_filler(struct inode *inode, struct page *page) static int nfs_symlink_filler(void *data, struct page *page)
{ {
struct inode *inode = data;
int error; int error;
error = NFS_PROTO(inode)->readlink(inode, page, 0, PAGE_SIZE); error = NFS_PROTO(inode)->readlink(inode, page, 0, PAGE_SIZE);
@ -65,8 +66,8 @@ static const char *nfs_get_link(struct dentry *dentry,
err = ERR_PTR(nfs_revalidate_mapping(inode, inode->i_mapping)); err = ERR_PTR(nfs_revalidate_mapping(inode, inode->i_mapping));
if (err) if (err)
return err; return err;
page = read_cache_page(&inode->i_data, 0, page = read_cache_page(&inode->i_data, 0, nfs_symlink_filler,
(filler_t *)nfs_symlink_filler, inode); inode);
if (IS_ERR(page)) if (IS_ERR(page))
return ERR_CAST(page); return ERR_CAST(page);
} }