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Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/kernel/sys_sparc.c27
1 files changed, 15 insertions, 12 deletions
diff --git a/arch/sparc/kernel/sys_sparc.c b/arch/sparc/kernel/sys_sparc.c
index a41c8a5c2007..94ff58c9d4a9 100644
--- a/arch/sparc/kernel/sys_sparc.c
+++ b/arch/sparc/kernel/sys_sparc.c
@@ -219,6 +219,21 @@ out:
return err;
}
+int sparc_mmap_check(unsigned long addr, unsigned long len, unsigned long flags)
+{
+ if (ARCH_SUN4C_SUN4 &&
+ (len > 0x20000000 ||
+ ((flags & MAP_FIXED) &&
+ addr < 0xe0000000 && addr + len > 0x20000000)))
+ return -EINVAL;
+
+ /* See asm-sparc/uaccess.h */
+ if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
+ return -EINVAL;
+
+ return 0;
+}
+
/* Linux version of mmap */
static unsigned long do_mmap2(unsigned long addr, unsigned long len,
unsigned long prot, unsigned long flags, unsigned long fd,
@@ -233,25 +248,13 @@ static unsigned long do_mmap2(unsigned long addr, unsigned long len,
goto out;
}
- retval = -EINVAL;
len = PAGE_ALIGN(len);
- if (ARCH_SUN4C_SUN4 &&
- (len > 0x20000000 ||
- ((flags & MAP_FIXED) &&
- addr < 0xe0000000 && addr + len > 0x20000000)))
- goto out_putf;
-
- /* See asm-sparc/uaccess.h */
- if (len > TASK_SIZE - PAGE_SIZE || addr + len > TASK_SIZE - PAGE_SIZE)
- goto out_putf;
-
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);
-out_putf:
if (file)
fput(file);
out: