linux-stable/arch/powerpc
Nicholas Piggin 66f93c5a02 powerpc/64: Fix kernel stack 16-byte alignment
Commit 4c2de74cc8 ("powerpc/64: Interrupts save PPR on stack rather
than thread_struct") changed sizeof(struct pt_regs) % 16 from 0 to 8,
which causes the interrupt frame allocation on kernel entry to put the
kernel stack out of alignment.

Quadword (16-byte) alignment for the stack is required by both the
64-bit v1 ABI (v1.9 § 3.2.2) and the 64-bit v2 ABI (v1.1 § 2.2.2.1).

Add a pad field to fix alignment, and add a BUILD_BUG_ON to catch this
in future.

Fixes: 4c2de74cc8 ("powerpc/64: Interrupts save PPR on stack rather than thread_struct")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-11-15 14:48:43 +11:00
..
boot powerpc fixes for 4.20 #2 2018-11-02 09:19:35 -07:00
configs powerpc/config: Enable CONFIG_PRINTK_TIME 2018-10-03 15:40:06 +10:00
crypto powerpc updates for 4.19 2018-08-17 11:32:50 -07:00
include powerpc/64: Fix kernel stack 16-byte alignment 2018-11-15 14:48:43 +11:00
kernel powerpc/64: Fix kernel stack 16-byte alignment 2018-11-15 14:48:43 +11:00
kvm KVM: PPC: Move and undef TRACE_INCLUDE_PATH/FILE 2018-11-07 23:04:38 +11:00
lib memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
math-emu
mm powerpc/numa: Suppress "VPHN is not supported" messages 2018-11-14 14:32:47 +11:00
net powerpc updates for 4.19 2018-08-17 11:32:50 -07:00
oprofile powerpc updates for 4.20 2018-10-26 14:36:21 -07:00
perf powerpc/8xx: Use patch_site for perf counters setup 2018-10-26 21:58:58 +11:00
platforms powerpc/powernv/npu: Remove NPU DMA ops 2018-11-05 16:05:22 +11:00
purgatory powerpc updates for 4.19 2018-08-17 11:32:50 -07:00
sysdev memblock: stop using implicit alignment to SMP_CACHE_BYTES 2018-10-31 08:54:16 -07:00
tools powerpc: Add a checkpatch wrapper with our preferred settings 2018-08-07 21:49:25 +10:00
xmon powerpc/xmon: Relax frame size for clang 2018-10-31 20:39:25 +11:00
Kbuild powerpc: Add -Werror at arch/powerpc level 2018-10-19 00:56:17 +11:00
Kconfig Kbuild updates for v4.20 (2nd) 2018-11-03 10:47:33 -07:00
Kconfig.debug powerpc: remove redundant 'default n' from Kconfig-s 2018-10-13 22:21:25 +11:00
Makefile kbuild: replace cc-name test with CONFIG_CC_IS_CLANG 2018-11-02 22:49:00 +09:00
Makefile.postlink