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Commit 3c18ddd1 authored by Nick Piggin's avatar Nick Piggin Committed by Linus Torvalds
Browse files

mm: remove nopage 



Nothing in the tree uses nopage any more.  Remove support for it in the
core mm code and documentation (and a few stray references to it in
comments).

Signed-off-by: default avatarNick Piggin <npiggin@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4d3d5b41

Documentation/feature-removal-schedule.txt

+0 −9
Original line number Original line Diff line number Diff line
@@ -128,15 +128,6 @@ Who: Arjan van de Ven <arjan@linux.intel.com> 




---------------------------

---------------------------





What:	vm_ops.nopage

When:	Soon, provided in-kernel callers have been converted

Why:	This interface is replaced by vm_ops.fault, but it has been around

	forever, is used by a lot of drivers, and doesn't cost much to

	maintain.

Who:	Nick Piggin <npiggin@suse.de>



---------------------------



What:	PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment

What:	PHYSDEVPATH, PHYSDEVBUS, PHYSDEVDRIVER in the uevent environment

When:	October 2008

When:	October 2008

Why:	The stacking of class devices makes these values misleading and

Why:	The stacking of class devices makes these values misleading and

Documentation/filesystems/Locking

+0 −3
Original line number Original line Diff line number Diff line
@@ -511,7 +511,6 @@ prototypes: 
	void (*open)(struct vm_area_struct*);

	void (*open)(struct vm_area_struct*);

	void (*close)(struct vm_area_struct*);

	void (*close)(struct vm_area_struct*);

	int (*fault)(struct vm_area_struct*, struct vm_fault *);

	int (*fault)(struct vm_area_struct*, struct vm_fault *);

	struct page *(*nopage)(struct vm_area_struct*, unsigned long, int *);

	int (*page_mkwrite)(struct vm_area_struct *, struct page *);

	int (*page_mkwrite)(struct vm_area_struct *, struct page *);





locking rules:

locking rules:
@@ -519,7 +518,6 @@ locking rules: 
open:		no	yes

open:		no	yes

close:		no	yes

close:		no	yes

fault:		no	yes

fault:		no	yes

nopage:		no	yes

page_mkwrite:	no	yes		no

page_mkwrite:	no	yes		no





	->page_mkwrite() is called when a previously read-only page is

	->page_mkwrite() is called when a previously read-only page is
@@ -537,4 +535,3 @@ NULL. 




ipc/shm.c::shm_delete() - may need BKL.

ipc/shm.c::shm_delete() - may need BKL.

->read() and ->write() in many drivers are (probably) missing BKL.
 
->read() and ->write() in many drivers are (probably) missing BKL.
 
drivers/sgi/char/graphics.c::sgi_graphics_nopage() - may need BKL.

drivers/media/video/vino.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -13,7 +13,7 @@ 
/*

/*

 * TODO:

 * TODO:

 * - remove "mark pages reserved-hacks" from memory allocation code

 * - remove "mark pages reserved-hacks" from memory allocation code

 *   and implement nopage()

 *   and implement fault()

 * - check decimation, calculating and reporting image size when

 * - check decimation, calculating and reporting image size when

 *   using decimation

 *   using decimation

 * - implement read(), user mode buffers and overlay (?)

 * - implement read(), user mode buffers and overlay (?)

drivers/video/vermilion/vermilion.c

+3 −2
Original line number Original line Diff line number Diff line
@@ -112,8 +112,9 @@ static int vmlfb_alloc_vram_area(struct vram_area *va, unsigned max_order, 




	/*

	/*

	 * It seems like __get_free_pages only ups the usage count

	 * It seems like __get_free_pages only ups the usage count

	 * of the first page. This doesn't work with nopage mapping, so

	 * of the first page. This doesn't work with fault mapping, so

	 * up the usage count once more.

	 * up the usage count once more (XXX: should use split_page or

	 * compound page).

	 */

	 */





	memset((void *)va->logical, 0x00, va->size);

	memset((void *)va->logical, 0x00, va->size);

fs/gfs2/ops_address.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -438,7 +438,7 @@ static int stuffed_readpage(struct gfs2_inode *ip, struct page *page) 
	int error;

	int error;





	/*

	/*

	 * Due to the order of unstuffing files and ->nopage(), we can be

	 * Due to the order of unstuffing files and ->fault(), we can be

	 * asked for a zero page in the case of a stuffed file being extended,

	 * asked for a zero page in the case of a stuffed file being extended,

	 * so we need to supply one here. It doesn't happen often.

	 * so we need to supply one here. It doesn't happen often.

	 */

	 */