[PATCH 4.4 60/75] MIPS: Fix 64k page support for 32 bit kernels.

From: Greg Kroah-Hartman
Date: Wed Jun 22 2016 - 19:13:06 EST


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

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

From: Ralf Baechle <ralf@xxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxx>
Tested-by: Joshua Henderson <joshua.henderson@xxxxxxxxxxxxx>
Cc: James Hogan <james.hogan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
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
@@ -45,7 +45,7 @@ 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

#define STACK_TOP_MAX TASK_SIZE