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authorWu Fengguang <fengguang.wu@intel.com>2009-12-14 17:58:10 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2009-12-15 08:53:12 -0800
commitee32398fda8ab9867cf8d5469d6e83de5f5c1f7c (patch)
treee9eb30bef01bea2f33d012d0faa8ca293c6113df /drivers/char/mem.c
parent80ad89a0ceb3b16d0f670751ef9875c4569fb4d3 (diff)
/dev/mem: remove redundant parameter from do_write_kmem()
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Avi Kivity <avi@qumranet.com> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/char/mem.c')
-rw-r--r--drivers/char/mem.c14
1 files changed, 6 insertions, 8 deletions
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 868ff2ce1675..be832b6f8279 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -461,7 +461,7 @@ static ssize_t read_kmem(struct file *file, char __user *buf,
static inline ssize_t
-do_write_kmem(void *p, unsigned long realp, const char __user * buf,
+do_write_kmem(unsigned long p, const char __user *buf,
size_t count, loff_t *ppos)
{
ssize_t written, sz;
@@ -470,12 +470,11 @@ do_write_kmem(void *p, unsigned long realp, const char __user * buf,
written = 0;
#ifdef __ARCH_HAS_NO_PAGE_ZERO_MAPPED
/* we don't have page 0 mapped on sparc and m68k.. */
- if (realp < PAGE_SIZE) {
- sz = size_inside_page(realp, count);
+ if (p < PAGE_SIZE) {
+ sz = size_inside_page(p, count);
/* Hmm. Do something? */
buf += sz;
p += sz;
- realp += sz;
count -= sz;
written += sz;
}
@@ -484,14 +483,14 @@ do_write_kmem(void *p, unsigned long realp, const char __user * buf,
while (count > 0) {
char *ptr;
- sz = size_inside_page(realp, count);
+ sz = size_inside_page(p, count);
/*
* On ia64 if a page has been mapped somewhere as
* uncached, then it must also be accessed uncached
* by the kernel or data corruption may occur
*/
- ptr = xlate_dev_kmem_ptr(p);
+ ptr = xlate_dev_kmem_ptr((char *)p);
copied = copy_from_user(ptr, buf, sz);
if (copied) {
@@ -502,7 +501,6 @@ do_write_kmem(void *p, unsigned long realp, const char __user * buf,
}
buf += sz;
p += sz;
- realp += sz;
count -= sz;
written += sz;
}
@@ -526,7 +524,7 @@ static ssize_t write_kmem(struct file * file, const char __user * buf,
if (p < (unsigned long) high_memory) {
unsigned long to_write = min_t(unsigned long, count,
(unsigned long)high_memory - p);
- wrote = do_write_kmem((void *)p, p, buf, to_write, ppos);
+ wrote = do_write_kmem(p, buf, to_write, ppos);
if (wrote != to_write)
return wrote;
p += wrote;