user/sven/linux.git/mm/process_vm_access.c, branch v4.0

mm: gup: use get_user_pages_unlocked

2015-02-12T01:06:05Z

This allows those get_user_pages calls to pass FAULT_FLAG_ALLOW_RETRY to the page fault in order to release the mmap_sem during the I/O. Signed-off-by: Andrea Arcangeli Reviewed-by: Kirill A. Shutemov Cc: Andres Lagar-Cavilla Cc: Peter Feiner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

start adding the tag to iov_iter

2014-05-06T21:32:49Z

For now, just use the same thing we pass to ->direct_IO() - it's all iovec-based at the moment. Pass it explicitly to iov_iter_init() and account for kvec vs. iovec in there, by the same kludge NFS ->direct_IO() uses. Signed-off-by: Al Viro

kill iov_iter_copy_from_user()

2014-05-06T21:32:42Z

all callers can use copy_page_from_iter() and it actually simplifies them. Signed-off-by: Al Viro

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2014-04-12T21:49:50Z

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 ...

mm/process_vm_access.c: mark function as static

2014-04-03T23:21:02Z

Mark function as static in process_vm_access.c because it is not used outside this file. This eliminates the following warning in mm/process_vm_access.c: mm/process_vm_access.c:416:1: warning: no previous prototype for `compat_process_vm_rw' [-Wmissing-prototypes] [akpm@linux-foundation.org: remove unneeded asmlinkage - compat_process_vm_rw isn't referenced from asm] Signed-off-by: Rashika Kheria Reviewed-by: Josh Triplett Acked-by: David Rientjes Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

process_vm_access: tidy up a bit

2014-04-02T03:19:29Z

saner variable names, update linuxdoc comments, etc. Signed-off-by: Al Viro

process_vm_access: don't bother with returning the amounts of bytes copied

2014-04-02T03:19:29Z

we can calculate that in the caller just fine, TYVM Signed-off-by: Al Viro

process_vm_rw_pages(): pass accurate amount of bytes

2014-04-02T03:19:28Z

... makes passing the amount of pages unnecessary Signed-off-by: Al Viro

process_vm_access: take get_user_pages/put_pages one level up

2014-04-02T03:19:28Z

... and trim the fuck out of process_vm_rw_pages() argument list. Signed-off-by: Al Viro

process_vm_access: switch to copy_page_to_iter/iov_iter_copy_from_user

2014-04-02T03:19:27Z

... rather than open-coding those. As a side benefit, we get much saner loop calling those; we can just feed entire pages, instead of the "copy would span the iovec boundary, let's do it in two loop iterations" mess. Signed-off-by: Al Viro