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authorAlexandre Ghiti <alex@ghiti.fr>2019-09-24 00:38:40 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-25 00:54:11 +0200
commit28058ed61fc869d7e67916725a3f7e9de50e606b (patch)
tree1002dd98986f9eb9f11abd9d59fbaf3d826c1542 /arch/arm64
parentmm, fs: move randomize_stack_top from fs to mm (diff)
downloadlinux-28058ed61fc869d7e67916725a3f7e9de50e606b.tar.xz
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arm64: make use of is_compat_task instead of hardcoding this test
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/. Link: http://lkml.kernel.org/r/20190730055113.23635-3-alex@ghiti.fr 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> Cc: Albert Ou <aou@eecs.berkeley.edu> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@infradead.org> Cc: James Hogan <jhogan@kernel.org> Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Paul Burton <paul.burton@mips.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/arm64')
-rw-r--r--arch/arm64/mm/mmap.c2
1 files changed, 1 insertions, 1 deletions
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;
#ifdef CONFIG_COMPAT
- if (test_thread_flag(TIF_32BIT))
+ if (is_compat_task())
rnd = get_random_long() & ((1UL << mmap_rnd_compat_bits) - 1);
else
#endif