[v6,02/14] arm64: Make use of is_compat_task instead of hardcoding this test
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Message ID 20190808061756.19712-3-alex@ghiti.fr
State New
Headers show
  • Provide generic top-down mmap layout functions
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Commit Message

Alex Ghiti Aug. 8, 2019, 6:17 a.m. UTC
Each architecture has its own way to determine if a task is a compat task,
by using is_compat_task in arch_mmap_rnd, it allows more genericity and
then it prepares its moving to mm/.

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Luis Chamberlain <mcgrof@kernel.org>
 arch/arm64/mm/mmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/arch/arm64/mm/mmap.c b/arch/arm64/mm/mmap.c
index b050641b5139..bb0140afed66 100644
--- a/arch/arm64/mm/mmap.c
+++ b/arch/arm64/mm/mmap.c
@@ -43,7 +43,7 @@  unsigned long arch_mmap_rnd(void)
 	unsigned long rnd;
-	if (test_thread_flag(TIF_32BIT))
+	if (is_compat_task())
 		rnd = get_random_long() & ((1UL << mmap_rnd_compat_bits) - 1);