linux/arch/arm64
Colin Ian King e6d9a52543 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>
2016-05-12 14:20:49 +01:00
..
boot ARM: DT changes, part 2 2016-03-24 19:01:38 -07:00
configs arm64: defconfig: updates for 4.6 2016-03-29 16:56:00 +01:00
crypto Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2016-03-17 11:22:54 -07:00
include arm64: Ensure pmd_present() returns false after pmd_mknotpresent() 2016-05-06 12:46:53 +01:00
kernel arm64: do not enforce strict 16 byte alignment to stack pointer 2016-05-12 14:20:49 +01:00
kvm arm64: kvm: Fix kvm teardown for systems using the extended idmap 2016-05-03 09:50:27 +01:00
lib arm64 updates for 4.6: 2016-03-17 20:03:47 -07:00
mm arm64: mm: remove unnecessary EXPORT_SYMBOL_GPL 2016-05-05 09:49:38 +01:00
net arm64: bpf: add extra pass to handle faulty codegen 2016-01-17 19:15:26 -05:00
xen xen/arm: introduce HYPERVISOR_platform_op on arm and arm64 2015-12-21 14:40:56 +00:00
Kconfig arm64: kconfig: drop CONFIG_RTC_LIB dependency 2016-04-28 19:43:37 +01:00
Kconfig.debug arm64: simplify kernel segment mapping granularity 2016-04-14 18:11:44 +01:00
Kconfig.platforms Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2016-03-24 10:29:44 -07:00
Makefile arm64 updates for 4.6: 2016-03-17 20:03:47 -07:00