linux-kernel - [PATCH 3.16 166/192] MIPS: Fix 64k page support for 32 bit kernels.

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Message-ID: <lsq.1507553065.479238569@decadent.org.uk>
Date:   Mon, 09 Oct 2017 13:44:25 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, "James Hogan" <james.hogan@...tec.com>,
        "Ralf Baechle" <ralf@...ux-mips.org>,
        "Joshua Henderson" <joshua.henderson@...rochip.com>
Subject: [PATCH 3.16 166/192] MIPS: Fix 64k page support for 32 bit kernels.

3.16.49-rc1 review patch.  If anyone has any objections, please let me know.

------------------

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

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: Ben Hutchings <ben@...adent.org.uk>
---
 arch/mips/include/asm/processor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -51,7 +51,7 @@ extern unsigned int vced_count, vcei_cou
  * 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__