4 Commits

Author	SHA1	Message	Date
Nicolas Pitre	43ae286b7d	[ARM] fix a couple clear_user_highpage assembly constraints ... In all cases the kaddr is assigned an input register even though it is modified in the assembly code. Let's assign a new variable to the modified value and mark those inline asm with volatile otherwise they get optimized away because the output variable is otherwise not used. Also fix a few conversion errors in copypage-feroceon.c and copypage-v4mc.c. Signed-off-by: Nicolas Pitre <nico@marvell.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>	2008-11-28 15:36:43 +00:00
Russell King	303c644365	[ARM] clearpage: provide our own clear_user_highpage() ... For similar reasons as copy_user_page(), we want to avoid the additional kmap_atomic if it's unnecessary. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>	2008-11-27 23:53:48 +00:00
Russell King	063b0a4207	[ARM] copypage: provide our own copy_user_highpage() ... We used to override the copy_user_page() function. However, this is not only inefficient, it also causes additional complexity for highmem support, since we convert from a struct page to a kernel direct mapped address and back to a struct page again. Moreover, with highmem support, we end up pointlessly setting up kmap entries for pages which we're going to remap. So, push the kmapping down into the copypage implementation files where it's required. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>	2008-11-27 23:53:47 +00:00
Russell King	d73e60b714	[ARM] copypage: convert assembly files to C ... Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>	2008-11-27 23:53:46 +00:00