[MIPS] sys_mmap2 offset argument should always be shifted 12, not PAGE_SHIFT.

[powerpc.git] / arch / mips / kernel / syscall.c

diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 55f2bc0..2aeaa2f 100644 (file)
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -162,7 +162,10 @@ asmlinkage unsigned long
 sys_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
           unsigned long flags, unsigned long fd, unsigned long pgoff)
 {
-       return do_mmap2(addr, len, prot, flags, fd, pgoff);
+       if (pgoff & (~PAGE_MASK >> 12))
+               return -EINVAL;
+
+       return do_mmap2(addr, len, prot, flags, fd, pgoff >> (PAGE_SHIFT-12));
 }
 
 save_static_function(sys_fork);