Skip to main content

Browse the archive

https://github.com/torvalds/linux
27 March 2024, 02:37:15 UTC
Revision 99a10a60ba9bedcf5d70ef81414d3e03816afa3f authored by Franck Bui-Huu on 12 October 2006, 19:06:33 UTC, committed by Linus Torvalds on 13 October 2006, 15:35:38 UTC 
[PATCH] Fix up mmap_kmem
 
vma->vm_pgoff is an pfn _offset_ relatif to the begining
of the memory start. The previous code was doing at first:

	vma->vm_pgoff << PAGE_SHIFT

which results into a wrong physical address since some
platforms have a physical mem start that can be different
from 0. After that the previous call __pa() on this
wrong physical address, however __pa() is used to convert
a _virtual_ address into a physical one.

This patch rewrites this convertion. It calculates the
pfn of PAGE_OFFSET which is the pfn of the mem start
then it adds the vma->vm_pgoff to it.

It also uses virt_to_phys() instead of __pa() since the
latter shouldn't be used by drivers.

Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
1 parent a5344a9
History
Tip revision: 99a10a60ba9bedcf5d70ef81414d3e03816afa3f authored by Franck Bui-Huu on 12 October 2006, 19:06:33 UTC
[PATCH] Fix up mmap_kmem
Tip revision: 99a10a6
File Mode Size
Documentation
arch
block
crypto
drivers
fs
include
init
ipc
kernel
lib
mm
net
scripts
security
sound
usr
.gitignore -rw-r--r-- 542 bytes
COPYING -rw-r--r-- 18.3 KB
CREDITS -rw-r--r-- 88.2 KB
Kbuild -rw-r--r-- 1.2 KB
MAINTAINERS -rw-r--r-- 73.3 KB
Makefile -rw-r--r-- 48.9 KB
README -rw-r--r-- 16.2 KB
REPORTING-BUGS -rw-r--r-- 3.0 KB

README

back to top