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authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-12 14:49:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-12 14:49:50 -0700
commit5166701b368caea89d57b14bf41cf39e819dad51 (patch)
treec73b9d4860809e3afa9359be9d03ba2d8d98a18e /fs/btrfs/file.c
parent0a7418f5f569512e98789c439198eed4b507cce3 (diff)
parenta786c06d9f2719203c00b3d97b21f9a96980d0b5 (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs updates from Al Viro: "The first vfs pile, with deep apologies for being very late in this window. Assorted cleanups and fixes, plus a large preparatory part of iov_iter work. There's a lot more of that, but it'll probably go into the next merge window - it *does* shape up nicely, removes a lot of boilerplate, gets rid of locking inconsistencie between aio_write and splice_write and I hope to get Kent's direct-io rewrite merged into the same queue, but some of the stuff after this point is having (mostly trivial) conflicts with the things already merged into mainline and with some I want more testing. This one passes LTP and xfstests without regressions, in addition to usual beating. BTW, readahead02 in ltp syscalls testsuite has started giving failures since "mm/readahead.c: fix readahead failure for memoryless NUMA nodes and limit readahead pages" - might be a false positive, might be a real regression..." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits) missing bits of "splice: fix racy pipe->buffers uses" cifs: fix the race in cifs_writev() ceph_sync_{,direct_}write: fix an oops on ceph_osdc_new_request() failure kill generic_file_buffered_write() ocfs2_file_aio_write(): switch to generic_perform_write() ceph_aio_write(): switch to generic_perform_write() xfs_file_buffered_aio_write(): switch to generic_perform_write() export generic_perform_write(), start getting rid of generic_file_buffer_write() generic_file_direct_write(): get rid of ppos argument btrfs_file_aio_write(): get rid of ppos kill the 5th argument of generic_file_buffered_write() kill the 4th argument of __generic_file_aio_write() lustre: don't open-code kernel_recvmsg() ocfs2: don't open-code kernel_recvmsg() drbd: don't open-code kernel_recvmsg() constify blk_rq_map_user_iov() and friends lustre: switch to kernel_sendmsg() ocfs2: don't open-code kernel_sendmsg() take iov_iter stuff to mm/iov_iter.c process_vm_access: tidy up a bit ...
Diffstat (limited to 'fs/btrfs/file.c')
-rw-r--r--fs/btrfs/file.c16
1 files changed, 5 insertions, 11 deletions
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index c5998477fe60..eb742c07e7a4 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -425,13 +425,8 @@ static noinline int btrfs_copy_from_user(loff_t pos, int num_pages,
struct page *page = prepared_pages[pg];
/*
* Copy data from userspace to the current page
- *
- * Disable pagefault to avoid recursive lock since
- * the pages are already locked
*/
- pagefault_disable();
copied = iov_iter_copy_from_user_atomic(page, i, offset, count);
- pagefault_enable();
/* Flush processor's dcache for this page */
flush_dcache_page(page);
@@ -1665,7 +1660,7 @@ again:
static ssize_t __btrfs_direct_write(struct kiocb *iocb,
const struct iovec *iov,
unsigned long nr_segs, loff_t pos,
- loff_t *ppos, size_t count, size_t ocount)
+ size_t count, size_t ocount)
{
struct file *file = iocb->ki_filp;
struct iov_iter i;
@@ -1674,7 +1669,7 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
loff_t endbyte;
int err;
- written = generic_file_direct_write(iocb, iov, &nr_segs, pos, ppos,
+ written = generic_file_direct_write(iocb, iov, &nr_segs, pos,
count, ocount);
if (written < 0 || written == count)
@@ -1693,7 +1688,7 @@ static ssize_t __btrfs_direct_write(struct kiocb *iocb,
if (err)
goto out;
written += written_buffered;
- *ppos = pos + written_buffered;
+ iocb->ki_pos = pos + written_buffered;
invalidate_mapping_pages(file->f_mapping, pos >> PAGE_CACHE_SHIFT,
endbyte >> PAGE_CACHE_SHIFT);
out:
@@ -1725,7 +1720,6 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
struct btrfs_root *root = BTRFS_I(inode)->root;
- loff_t *ppos = &iocb->ki_pos;
u64 start_pos;
u64 end_pos;
ssize_t num_written = 0;
@@ -1796,7 +1790,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
if (unlikely(file->f_flags & O_DIRECT)) {
num_written = __btrfs_direct_write(iocb, iov, nr_segs,
- pos, ppos, count, ocount);
+ pos, count, ocount);
} else {
struct iov_iter i;
@@ -1804,7 +1798,7 @@ static ssize_t btrfs_file_aio_write(struct kiocb *iocb,
num_written = __btrfs_buffered_write(file, &i, pos);
if (num_written > 0)
- *ppos = pos + num_written;
+ iocb->ki_pos = pos + num_written;
}
mutex_unlock(&inode->i_mutex);