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authorColin Ian King <colin.king@canonical.com>2016-05-11 19:56:54 +0300
committerWill Deacon <will.deacon@arm.com>2016-05-12 16:20:49 +0300
commite6d9a52543338603e25e71e0e4942f05dae0dd8a (patch)
treefd4dc45735731b36083579528999ae2ac53f230c /arch/nios2
parent61462c8a6b140fe2f93cb911684837e05950e680 (diff)
downloadlinux-e6d9a52543338603e25e71e0e4942f05dae0dd8a.tar.xz
arm64: do not enforce strict 16 byte alignment to stack pointer
copy_thread should not be enforcing 16 byte aligment and returning -EINVAL. Other architectures trap misaligned stack access with SIGBUS so arm64 should follow this convention, so remove the strict enforcement check. For example, currently clone(2) fails with -EINVAL when passing a misaligned stack and this gives little clue to what is wrong. Instead, it is arguable that a SIGBUS on the fist access to a misaligned stack allows one to figure out that it is a misaligned stack issue rather than trying to figure out why an unconventional (and undocumented) -EINVAL is being returned. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/nios2')
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