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NFS: Remove call to igrab() from nfs_writepage() 

We always ensure that the nfs_open_context holds a reference to the dentry,
so the test in nfs_writepage() for whether or not the inode is referenced
is redundant.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2006-12-05 00:35:39 -05:00
parent 49a70f2786
commit 87a4ce1608
1 changed files with 1 additions and 15 deletions
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16
fs/nfs/write.c
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@ -317,24 +317,12 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc)
struct nfs_open_context *ctx;
struct inode *inode = page->mapping->host;
unsigned offset;
int inode_referenced = 0;
int priority = wb_priority(wbc);
int err;
nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGE);
nfs_add_stats(inode, NFSIOS_WRITEPAGES, 1);
/*
* Note: We need to ensure that we have a reference to the inode
* if we are to do asynchronous writes. If not, waiting
* in nfs_wait_on_request() may deadlock with clear_inode().
*
* If igrab() fails here, then it is in any case safe to
* call nfs_wb_page(), since there will be no pending writes.
*/
if (igrab(inode) != 0)
inode_referenced = 1;
/* Ensure we've flushed out any previous writes */
nfs_wb_page_priority(inode, page, priority);
@ -349,7 +337,7 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc)
goto out;
}
lock_kernel();
if (!IS_SYNC(inode) && inode_referenced) {
if (!IS_SYNC(inode)) {
err = nfs_writepage_async(ctx, inode, page, 0, offset);
if (!wbc->for_writepages)
nfs_flush_mapping(page->mapping, wbc, wb_priority(wbc));
@ -366,8 +354,6 @@ int nfs_writepage(struct page *page, struct writeback_control *wbc)
put_nfs_open_context(ctx);
out:
unlock_page(page);
if (inode_referenced)
iput(inode);
return err;
}