From: David Daney <david.daney@cavium.com>
Date: Thu, 19 Jul 2012 07:11:14 +0000 (+0200)
Subject: MIPS: Properly align the .data..init_task section.
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7b1c0d26a8e272787f0f9fcc5f3e8531df3b3409;p=GitHub%2Fexynos8895%2Fandroid_kernel_samsung_universal8895.git

MIPS: Properly align the .data..init_task section.

Improper alignment can lead to unbootable systems and/or random
crashes.

[ralf@linux-mips.org: This is a lond standing bug since
6eb10bc9e2deab06630261cd05c4cb1e9a60e980 (kernel.org) rsp.
c422a10917f75fd19fa7fe070aaaa23e384dae6f (lmo) [MIPS: Clean up linker script
using new linker script macros.] so dates back to 2.6.32.]

Signed-off-by: David Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org>
Patchwork: https://patchwork.linux-mips.org/patch/3881/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
---

diff --git a/arch/mips/include/asm/thread_info.h b/arch/mips/include/asm/thread_info.h
index e2eca7d10598..ca97e0ecb64b 100644
--- a/arch/mips/include/asm/thread_info.h
+++ b/arch/mips/include/asm/thread_info.h
@@ -60,6 +60,8 @@ struct thread_info {
 register struct thread_info *__current_thread_info __asm__("$28");
 #define current_thread_info()  __current_thread_info
 
+#endif /* !__ASSEMBLY__ */
+
 /* thread information allocation */
 #if defined(CONFIG_PAGE_SIZE_4KB) && defined(CONFIG_32BIT)
 #define THREAD_SIZE_ORDER (1)
@@ -85,8 +87,6 @@ register struct thread_info *__current_thread_info __asm__("$28");
 
 #define STACK_WARN	(THREAD_SIZE / 8)
 
-#endif /* !__ASSEMBLY__ */
-
 #define PREEMPT_ACTIVE		0x10000000
 
 /*
diff --git a/arch/mips/kernel/vmlinux.lds.S b/arch/mips/kernel/vmlinux.lds.S
index 924da5eb7031..df243a64f430 100644
--- a/arch/mips/kernel/vmlinux.lds.S
+++ b/arch/mips/kernel/vmlinux.lds.S
@@ -1,5 +1,6 @@
 #include <asm/asm-offsets.h>
 #include <asm/page.h>
+#include <asm/thread_info.h>
 #include <asm-generic/vmlinux.lds.h>
 
 #undef mips
@@ -72,7 +73,7 @@ SECTIONS
 	.data : {	/* Data */
 		. = . + DATAOFFSET;		/* for CONFIG_MAPPED_KERNEL */
 
-		INIT_TASK_DATA(PAGE_SIZE)
+		INIT_TASK_DATA(THREAD_SIZE)
 		NOSAVE_DATA
 		CACHELINE_ALIGNED_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)
 		READ_MOSTLY_DATA(1 << CONFIG_MIPS_L1_CACHE_SHIFT)