linux-kernel - [PATCH 3.12 02/88] MIPS: Fix 64k page support for 32 bit kernels.

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Date:	Thu, 14 Jul 2016 10:14:54 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, Ralf Baechle <ralf@...ux-mips.org>,
	James Hogan <james.hogan@...tec.com>,
	Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 02/88] MIPS: Fix 64k page support for 32 bit kernels.

From: Ralf Baechle <ralf@...ux-mips.org>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit d7de413475f443957a0c1d256e405d19b3a2cb22 upstream.

TASK_SIZE was defined as 0x7fff8000UL which for 64k pages is not a
multiple of the page size.  Somewhere further down the math fails
such that executing an ELF binary fails.

Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Tested-by: Joshua Henderson <joshua.henderson@...rochip.com>
Cc: James Hogan <james.hogan@...tec.com>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 arch/mips/include/asm/processor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 3605b844ad87..efe9964ea9b4 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -51,7 +51,7 @@ extern unsigned int vced_count, vcei_count;
  * User space process size: 2GB. This is hardcoded into a few places,
  * so don't change it unless you know what you are doing.
  */
-#define TASK_SIZE	0x7fff8000UL
+#define TASK_SIZE	0x80000000UL
 #endif
 
 #ifdef __KERNEL__
-- 
2.9.1