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Commit 0cb18b7b authored by Josef Bacik's avatar Josef Bacik Committed by Minchan Kim
Browse files

UPSTREAM: filemap: pass vm_fault to the mmap ra helpers 

All of the arguments to these functions come from the vmf.

Cut down on the amount of arguments passed by simply passing in the vmf
to these two helpers.

Bug: 124328118
Change-Id: I874f8320d8393f2e39aab030fcf43e51c882e90a
Link: http://lkml.kernel.org/r/20181211173801.29535-3-josef@toxicpanda.com


Signed-off-by: default avatarJosef Bacik <josef@toxicpanda.com>
Reviewed-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Reviewed-by: default avatarJan Kara <jack@suse.cz>
Cc: Dave Chinner <david@fromorbit.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Rik van Riel <riel@redhat.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
(cherry picked from commit 2a1180f1bd389e9d47693e5eb384b95f482d8d19)
Signed-off-by: default avatarMinchan Kim <minchan@google.com>
parent 03f1452c

mm/filemap.c

+14 −14
Original line number Diff line number Diff line
@@ -2420,20 +2420,20 @@ static int page_cache_read(struct file *file, pgoff_t offset, gfp_t gfp_mask) 
 * Synchronous readahead happens when we don't even find

 * a page in the page cache at all.

 */

static void do_sync_mmap_readahead(struct vm_area_struct *vma,

				   struct file_ra_state *ra,

				   struct file *file,

				   pgoff_t offset)

static void do_sync_mmap_readahead(struct vm_fault *vmf)

{

	struct file *file = vmf->vma->vm_file;

	struct file_ra_state *ra = &file->f_ra;

	struct address_space *mapping = file->f_mapping;

	pgoff_t offset = vmf->pgoff;



	/* If we don't want any read-ahead, don't bother */

	if (vma->vm_flags & VM_RAND_READ)

	if (vmf->vma->vm_flags & VM_RAND_READ)

		return;

	if (!ra->ra_pages)

		return;



	if (vma->vm_flags & VM_SEQ_READ) {

	if (vmf->vma->vm_flags & VM_SEQ_READ) {

		page_cache_sync_readahead(mapping, ra, file, offset,

					  ra->ra_pages);

		return;
@@ -2463,16 +2463,16 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma, 
 * Asynchronous readahead happens when we find the page and PG_readahead,

 * so we want to possibly extend the readahead further..

 */

static void do_async_mmap_readahead(struct vm_area_struct *vma,

				    struct file_ra_state *ra,

				    struct file *file,

				    struct page *page,

				    pgoff_t offset)

static void do_async_mmap_readahead(struct vm_fault *vmf,

				    struct page *page)

{

	struct file *file = vmf->vma->vm_file;

	struct file_ra_state *ra = &file->f_ra;

	struct address_space *mapping = file->f_mapping;

	pgoff_t offset = vmf->pgoff;



	/* If we don't want any read-ahead, don't bother */

	if (vma->vm_flags & VM_RAND_READ)

	if (vmf->vma->vm_flags & VM_RAND_READ)

		return;

	if (ra->mmap_miss > 0)

		ra->mmap_miss--;
@@ -2529,10 +2529,10 @@ vm_fault_t filemap_fault(struct vm_fault *vmf) 
		 * We found the page, so try async readahead before

		 * waiting for the lock.

		 */

		do_async_mmap_readahead(vmf->vma, ra, file, page, offset);

		do_async_mmap_readahead(vmf, page);

	} else if (!page) {

		/* No page in the page cache at all */

		do_sync_mmap_readahead(vmf->vma, ra, file, offset);

		do_sync_mmap_readahead(vmf);

		count_vm_event(PGMAJFAULT);

		count_memcg_event_mm(vmf->vma->vm_mm, PGMAJFAULT);

		ret = VM_FAULT_MAJOR;