diff options
Diffstat (limited to 'drivers/char/mem.c')
| -rw-r--r-- | drivers/char/mem.c | 14 |
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; |