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Subject[PATCH 9/19] arm: add arch_mmap_check(), get rid of sys_arm_mremap()
From

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
arch/arm/include/asm/mman.h | 3 +++
arch/arm/kernel/calls.S | 2 +-
arch/arm/kernel/sys_arm.c | 25 -------------------------
3 files changed, 4 insertions(+), 26 deletions(-)

diff --git a/arch/arm/include/asm/mman.h b/arch/arm/include/asm/mman.h
index 8eebf89..41f99c5 100644
--- a/arch/arm/include/asm/mman.h
+++ b/arch/arm/include/asm/mman.h
@@ -1 +1,4 @@
#include <asm-generic/mman.h>
+
+#define arch_mmap_check(addr, len, flags) \
+ (((flags) & MAP_FIXED && (addr) < FIRST_USER_ADDRESS) ? -EINVAL : 0)
diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
index fafce1b..4f07168 100644
--- a/arch/arm/kernel/calls.S
+++ b/arch/arm/kernel/calls.S
@@ -172,7 +172,7 @@
/* 160 */ CALL(sys_sched_get_priority_min)
CALL(sys_sched_rr_get_interval)
CALL(sys_nanosleep)
- CALL(sys_arm_mremap)
+ CALL(sys_mremap)
CALL(sys_setresuid16)
/* 165 */ CALL(sys_getresuid16)
CALL(sys_ni_syscall) /* vm86 */
diff --git a/arch/arm/kernel/sys_arm.c b/arch/arm/kernel/sys_arm.c
index 78ecaac..3b89744 100644
--- a/arch/arm/kernel/sys_arm.c
+++ b/arch/arm/kernel/sys_arm.c
@@ -28,10 +28,6 @@
#include <linux/ipc.h>
#include <linux/uaccess.h>

-extern unsigned long do_mremap(unsigned long addr, unsigned long old_len,
- unsigned long new_len, unsigned long flags,
- unsigned long new_addr);
-
/* common code for old and new mmaps */
inline long do_mmap2(
unsigned long addr, unsigned long len,
@@ -43,9 +39,6 @@ inline long do_mmap2(

flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);

- if (flags & MAP_FIXED && addr < FIRST_USER_ADDRESS)
- goto out;
-
error = -EBADF;
if (!(flags & MAP_ANONYMOUS)) {
file = fget(fd);
@@ -89,24 +82,6 @@ out:
return error;
}

-asmlinkage unsigned long
-sys_arm_mremap(unsigned long addr, unsigned long old_len,
- unsigned long new_len, unsigned long flags,
- unsigned long new_addr)
-{
- unsigned long ret = -EINVAL;
-
- if (flags & MREMAP_FIXED && new_addr < FIRST_USER_ADDRESS)
- goto out;
-
- down_write(&current->mm->mmap_sem);
- ret = do_mremap(addr, old_len, new_len, flags, new_addr);
- up_write(&current->mm->mmap_sem);
-
-out:
- return ret;
-}
-
/*
* Perform the select(nd, in, out, ex, tv) and mmap() system
* calls.
--
1.5.6.5



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