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(parent: 6d8530a) | patch
powerpc: align stack to 2 * THREAD_SIZE with VMAP_STACK
authorChristophe Leroy <christophe.leroy@c-s.fr>
Sat, 21 Dec 2019 08:32:28 +0000 (08:32 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Sun, 26 Jan 2020 11:15:09 +0000 (22:15 +1100)
commitd84444b2c60badc9a1263242eae83efb5984f4ad
tree0fca41eaaab4e435a4bb9b66910ad367133e72aftree | snapshot
parent6d8530ad28c22ad566254f1222320a649df5246acommit | diff
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
arch/powerpc/include/asm/thread_info.h diff | blob | history
arch/powerpc/kernel/setup_32.c diff | blob | history
arch/powerpc/kernel/setup_64.c diff | blob | history
arch/powerpc/kernel/vmlinux.lds.S diff | blob | history
Linux Kernel Source Tree.