[3.8.y.z extended stable] Patch "arm64: uid16: fix __kernel_old_{gid, uid}_t definitions" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    arm64: uid16: fix __kernel_old_{gid,uid}_t definitions

to the linux-3.8.y-queue branch of the 3.8.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.8.y-queue

This patch is scheduled to be released in version 3.8.13.27.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.8.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

------

>From dead913851d7659abd5d3a6d7f88886f7ec047e5 Mon Sep 17 00:00:00 2001
From: Will Deacon <will.deacon at arm.com>
Date: Mon, 2 Jun 2014 11:47:29 +0100
Subject: arm64: uid16: fix __kernel_old_{gid,uid}_t definitions

commit 34c65c43f1518bf85f93526ad373adc6a683b4c5 upstream.

Whilst native arm64 applications don't have the 16-bit UID/GID syscalls
wired up, compat tasks can still access them. The 16-bit wrappers for
these syscalls use __kernel_old_uid_t and __kernel_old_gid_t, which must
be 16-bit data types to maintain compatibility with the 16-bit UIDs used
by compat applications.

This patch defines 16-bit __kernel_old_{gid,uid}_t types for arm64
instead of using the 32-bit types provided by asm-generic.

Signed-off-by: Will Deacon <will.deacon at arm.com>
Acked-by: Arnd Bergmann <arnd at arndb.de>
Signed-off-by: Catalin Marinas <catalin.marinas at arm.com>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 arch/arm64/include/asm/Kbuild             |  1 -
 arch/arm64/include/uapi/asm/posix_types.h | 10 ++++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm64/include/uapi/asm/posix_types.h

diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index 14a9d5a..9357d33 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild
@@ -27,7 +27,6 @@ generic-y += mutex.h
 generic-y += pci.h
 generic-y += percpu.h
 generic-y += poll.h
-generic-y += posix_types.h
 generic-y += resource.h
 generic-y += scatterlist.h
 generic-y += sections.h
diff --git a/arch/arm64/include/uapi/asm/posix_types.h b/arch/arm64/include/uapi/asm/posix_types.h
new file mode 100644
index 0000000..7985ff6
--- /dev/null
+++ b/arch/arm64/include/uapi/asm/posix_types.h
@@ -0,0 +1,10 @@
+#ifndef __ASM_POSIX_TYPES_H
+#define __ASM_POSIX_TYPES_H
+
+typedef unsigned short __kernel_old_uid_t;
+typedef unsigned short __kernel_old_gid_t;
+#define __kernel_old_uid_t __kernel_old_uid_t
+
+#include <asm-generic/posix_types.h>
+
+#endif /*  __ASM_POSIX_TYPES_H */
--
1.9.1