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[1/2] riscv: stack: Fixup independent irq stack for CONFIG_FRAME_POINTER=n

Message ID 20230715134552.3437933-2-guoren@kernel.org (mailing list archive)
State Superseded
Headers show
Series riscv: stack: Fixup independent softirq/irq stack for CONFIG_FRAME_POINTER=n | expand

Checks

Context Check Description
conchuod/cover_letter success Series has a cover letter
conchuod/tree_selection success Guessed tree name to be fixes at HEAD ab2dbc7acced
conchuod/fixes_present success Fixes tag present in non-next series
conchuod/maintainers_pattern success MAINTAINERS pattern errors before the patch: 4 and now 4
conchuod/verify_signedoff success Signed-off-by tag matches author and committer
conchuod/kdoc success Errors and warnings before: 0 this patch: 0
conchuod/build_rv64_clang_allmodconfig success Errors and warnings before: 9 this patch: 9
conchuod/module_param success Was 0 now: 0
conchuod/build_rv64_gcc_allmodconfig fail Failed to build the tree with this patch.
conchuod/build_rv32_defconfig success Build OK
conchuod/dtb_warn_rv64 success Errors and warnings before: 3 this patch: 3
conchuod/header_inline success No static functions without inline keyword in header files
conchuod/checkpatch warning WARNING: Reported-by: should be immediately followed by Closes: with a URL to the report
conchuod/build_rv64_nommu_k210_defconfig success Build OK
conchuod/verify_fixes success Fixes tag looks correct
conchuod/build_rv64_nommu_virt_defconfig fail Build failed

Commit Message

Guo Ren July 15, 2023, 1:45 p.m. UTC 
From: Guo Ren <guoren@linux.alibaba.com>

The independent irq stack uses s0 to save & restore sp, but s0 would be
corrupted when CONFIG_FRAME_POINTER=n. So add s0 in the clobber list to
fix the problem.

Fixes: 163e76cc6ef4 ("riscv: stack: Support HAVE_IRQ_EXIT_ON_IRQ_STACK")
Reported-by: Zhangjin Wu <falcon@tinylab.org>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Signed-off-by: Guo Ren <guoren@kernel.org>
---
 arch/riscv/kernel/traps.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/arch/riscv/kernel/traps.c b/arch/riscv/kernel/traps.c
index f910dfccbf5d..f75d97de518a 100644
--- a/arch/riscv/kernel/traps.c
+++ b/arch/riscv/kernel/traps.c
@@ -371,7 +371,7 @@  asmlinkage void noinstr do_irq(struct pt_regs *regs)
 		:
 		: [sp] "r" (sp), [regs] "r" (regs)
 		: "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7",
-		  "t0", "t1", "t2", "t3", "t4", "t5", "t6",
+		  "t0", "t1", "t2", "t3", "t4", "t5", "t6", "s0",
 		  "memory");
 	} else
 #endif