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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-12-21 09:32:28 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-01-26 12:15:09 +0100 |
| commit | 63289e7d3a645a4291ec43c1d526dd4a811da1a0 (patch) | |
| tree | 0fca41eaaab4e435a4bb9b66910ad367133e72af /arch/powerpc/kernel/setup_32.c | |
| parent | powerpc/32: prepare for CONFIG_VMAP_STACK (diff) | |
| download | linux-63289e7d3a645a4291ec43c1d526dd4a811da1a0.tar.xz linux-63289e7d3a645a4291ec43c1d526dd4a811da1a0.zip | |
powerpc: align stack to 2 * THREAD_SIZE with VMAP_STACK
In order to ease stack overflow detection, align
stack to 2 * THREAD_SIZE when using VMAP_STACK.
This allows overflow detection using a single bit check.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/60e9ae86b7d2cdcf21468787076d345663648f46.1576916812.git.christophe.leroy@c-s.fr
Diffstat (limited to 'arch/powerpc/kernel/setup_32.c')
| -rw-r--r-- | arch/powerpc/kernel/setup_32.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c index dcffe927f5b9..f014c4f7a337 100644 --- a/arch/powerpc/kernel/setup_32.c +++ b/arch/powerpc/kernel/setup_32.c @@ -140,7 +140,7 @@ arch_initcall(ppc_init); static void *__init alloc_stack(void) { - void *ptr = memblock_alloc(THREAD_SIZE, THREAD_SIZE); + void *ptr = memblock_alloc(THREAD_SIZE, THREAD_ALIGN); if (!ptr) panic("cannot allocate %d bytes for stack at %pS\n", |