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Unify sys_mmap*

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New helper - sys_mmap_pgoff(); switch syscalls to using it.

Acked-by: David S. Miller <[email protected]>
Signed-off-by: Al Viro <[email protected]>
This commit is contained in:
Al Viro 2009-11-30 17:37:04 -05:00
commit f8b7256096
46 changed files with 109 additions and 907 deletions
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29
mm/util.c
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@ -4,6 +4,10 @@
#include <linux/module.h>
#include <linux/err.h>
#include <linux/sched.h>
#include <linux/hugetlb.h>
#include <linux/syscalls.h>
#include <linux/mman.h>
#include <linux/file.h>
#include <asm/uaccess.h>
#define CREATE_TRACE_POINTS
@ -268,6 +272,31 @@ int __attribute__((weak)) get_user_pages_fast(unsigned long start,
}
EXPORT_SYMBOL_GPL(get_user_pages_fast);
SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len,
unsigned long, prot, unsigned long, flags,
unsigned long, fd, unsigned long, pgoff)
{
struct file * file = NULL;
unsigned long retval = -EBADF;
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
if (!file)
goto out;
}
flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
down_write(&current->mm->mmap_sem);
retval = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
up_write(&current->mm->mmap_sem);
if (file)
fput(file);
out:
return retval;
}
/* Tracepoints definitions. */
EXPORT_TRACEPOINT_SYMBOL(kmalloc);
EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc);