[PATCH v2 1/2] riscv: signal: fix signal frame size

From: Yong-Xuan Wang
Date: Fri Dec 20 2024 - 03:40:09 EST


The signal context of certain RISC-V extensions will be appended after
struct __riscv_extra_ext_header, which already includes an empty context
header. Therefore, there is no need to preserve a separate hdr for the
END of signal context.

Fixes: 8ee0b41898fa ("riscv: signal: Add sigcontext save/restore for vector")
Signed-off-by: Yong-Xuan Wang <yongxuan.wang@xxxxxxxxxx>
Reviewed-by: Zong Li <zong.li@xxxxxxxxxx>
Reviewed-by: Andy Chiu <AndybnAC@xxxxxxxxx>
---
arch/riscv/kernel/signal.c | 6 ------
1 file changed, 6 deletions(-)

diff --git a/arch/riscv/kernel/signal.c b/arch/riscv/kernel/signal.c
index dcd282419456..c3c517b9eee5 100644
--- a/arch/riscv/kernel/signal.c
+++ b/arch/riscv/kernel/signal.c
@@ -215,12 +215,6 @@ static size_t get_rt_frame_size(bool cal_all)
if (cal_all || riscv_v_vstate_query(task_pt_regs(current)))
total_context_size += riscv_v_sc_size;
}
- /*
- * Preserved a __riscv_ctx_hdr for END signal context header if an
- * extension uses __riscv_extra_ext_header
- */
- if (total_context_size)
- total_context_size += sizeof(struct __riscv_ctx_hdr);

frame_size += total_context_size;

--
2.17.1