mips: replace arch specific way to determine 32bit task with generic version

Mips uses TASK_IS_32BIT_ADDR to determine if a task is 32bit, but this
define is mips specific and other arches do not have it: instead, use
!IS_ENABLED(CONFIG_64BIT) || is_compat_task() condition.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Alexandre Ghiti <[email protected]>
Acked-by: Paul Burton <[email protected]>
Reviewed-by: Kees Cook <[email protected]>
Reviewed-by: Luis Chamberlain <[email protected]>
Cc: Albert Ou <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: James Hogan <[email protected]>
Cc: Palmer Dabbelt <[email protected]>
Cc: Ralf Baechle <[email protected]>
Cc: Russell King <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

1 files changed, 2 insertions, 1 deletions

diff --git a/arch/mips/mm/mmap.c b/arch/mips/mm/mmap.c
index ff6ab87e9c56..d5106c26ac6a 100644
--- a/arch/mips/mm/mmap.c
+++ b/arch/mips/mm/mmap.c
@@ -17,6 +17,7 @@
 #include <linux/sched/signal.h>
 #include <linux/sched/mm.h>
 #include <linux/sizes.h>
+#include <linux/compat.h>
 
 unsigned long shm_align_mask = PAGE_SIZE - 1;	/* Sane caches */
 EXPORT_SYMBOL(shm_align_mask);
@@ -191,7 +192,7 @@ static inline unsigned long brk_rnd(void)
 
 	rnd = rnd << PAGE_SHIFT;
 	/* 32MB for 32bit, 1GB for 64bit */
-	if (TASK_IS_32BIT_ADDR)
+	if (!IS_ENABLED(CONFIG_64BIT) || is_compat_task())
 		rnd = rnd & (SZ_32M - 1);
 	else
 		rnd = rnd & (SZ_1G - 1);