[PATCH] The o32 fstatat syscall behaves differently on 32 and 64 bit kernels

[Richard Sandiford <richard@codesourcery.com>]

While working on a glibc patch to support the fstatat() functions[1],
I noticed that the o32 implementation behaves differently on 32-bit and
64-bit kernels; the former provides a stat64 while the latter provides
a plain (o32) stat.  I think the former is what's intended, as there is
no separate fstatat64.  It's also what x86 does.

I think this is just a case of a compat too far.  The o32 stat64 is the
same as plain stat on n64, so 64-bit kernels can just use newfstatat.
(n32 already does this, and works correctly as-is.)

Tested with the glibc patch, where it fixes the test I'd written.
Please install if OK.

Richard

[1] I've seen Khem's patch, but I don't think it's right.

Signed-off-by: Richard Sandiford <richard@codesourcery.com>

diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 2ac0141..288ee4a 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -498,7 +498,7 @@ sys_call_table:
        PTR     sys_mknodat                     /* 4290 */
        PTR     sys_fchownat
        PTR     compat_sys_futimesat
-       PTR     compat_sys_newfstatat
+       PTR     sys_newfstatat
        PTR     sys_unlinkat
        PTR     sys_renameat                    /* 4295 */
        PTR     sys_linkat