Commit 3c250aec authored by Huacai Chen's avatar Huacai Chen
Browse files

LoongArch: Fix build errors for CONFIG_RANDSTRUCT 



When CONFIG_RANDSTRUCT enabled, members of task_struct are randomized.
There is a chance that TASK_STACK_CANARY be out of 12bit immediate's
range and causes build errors. TASK_STACK_CANARY is naturally aligned,
so fix it by replacing ld.d/st.d with ldptr.d/stptr.d which have 14bit
immediates.

Cc: stable@vger.kernel.org
Reported-by: default avatarkernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202511240656.0NaPcJs1-lkp@intel.com/


Suggested-by: default avatarRui Wang <wangrui@loongson.cn>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 17fcc4bd

arch/loongarch/kernel/switch.S

+2 −2
Original line number Diff line number Diff line
@@ -25,8 +25,8 @@ SYM_FUNC_START(__switch_to) 
	stptr.d a4, a0, THREAD_SCHED_CFA

#if defined(CONFIG_STACKPROTECTOR) && !defined(CONFIG_SMP)

	la	t7, __stack_chk_guard

	LONG_L	t8, a1, TASK_STACK_CANARY

	LONG_S	t8, t7, 0

	ldptr.d	t8, a1, TASK_STACK_CANARY

	stptr.d	t8, t7, 0

#endif

	move	tp, a2

	cpu_restore_nonscratch a1