[MIPS] Fix O32 personality(2) call with 0xffffffff argument.

A sign extension bug did result in sys_personality being invoked with a
0xffffffffffffffffUL argument, so querying the current personality didn't
work.

Signed-off-by: Thiemo Seufer <ths@networkno.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 53f4171..7a3ebbe 100644 (file)
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -1055,7 +1055,9 @@ asmlinkage long sys32_newuname(struct new_utsname __user * name)
 asmlinkage int sys32_personality(unsigned long personality)
 {
        int ret;
-       if (current->personality == PER_LINUX32 && personality == PER_LINUX)
+       personality &= 0xffffffff;
+       if (personality(current->personality) == PER_LINUX32 &&
+           personality == PER_LINUX)
                personality = PER_LINUX32;
        ret = sys_personality(personality);
        if (ret == PER_LINUX32)