arm: add arch_mmap_check(), get rid of sys_arm_mremap()

Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/arch/arm/include/asm/mman.h b/arch/arm/include/asm/mman.h
index 8eebf89..41f99c5 100644 (file)
--- 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 f58c115..9314a2d 100644 (file)
--- 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 (file)
--- 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.