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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2022-04-09 19:17:26 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-05-05 14:11:56 +0200 |
| commit | 723820f3f77dc9f7ffdceb076ebcf6a5b91d0a27 (patch) | |
| tree | 03bd82e2fd5f37b15e84eb16ee514fb0632f19cc /mm | |
| parent | Merge tag 'v5.18-rc4' into next (diff) | |
| download | linux-723820f3f77dc9f7ffdceb076ebcf6a5b91d0a27.tar.xz linux-723820f3f77dc9f7ffdceb076ebcf6a5b91d0a27.zip | |
mm: Allow arch specific arch_randomize_brk() with CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
Commit e7142bf5d231 ("arm64, mm: make randomization selected by
generic topdown mmap layout") introduced a default version of
arch_randomize_brk() provided when
CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT is selected.
powerpc could select CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
but needs to provide its own arch_randomize_brk().
In order to allow that, define generic version of arch_randomize_brk()
as a __weak symbol.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b222f1ca06c850daf1b2f26afdb46c6dd97d21ba.1649523076.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/util.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/util.c b/mm/util.c index 3492a9e81aa3..44fbf211312d 100644 --- a/mm/util.c +++ b/mm/util.c @@ -344,7 +344,7 @@ unsigned long randomize_stack_top(unsigned long stack_top) } #ifdef CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT -unsigned long arch_randomize_brk(struct mm_struct *mm) +unsigned long __weak arch_randomize_brk(struct mm_struct *mm) { /* Is the current task 32bit ? */ if (!IS_ENABLED(CONFIG_64BIT) || is_compat_task()) |