Unverified Commit aa49bc2c authored by Yong-Xuan Wang's avatar Yong-Xuan Wang Committed by Palmer Dabbelt
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riscv: signal: fix signal frame size 



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: 8ee0b418 ("riscv: signal: Add sigcontext save/restore for vector")
Signed-off-by: default avatarYong-Xuan Wang <yongxuan.wang@sifive.com>
Reviewed-by: default avatarZong Li <zong.li@sifive.com>
Reviewed-by: default avatarAndy Chiu <AndybnAC@gmail.com>
Reviewed-by: default avatarAlexandre Ghiti <alexghiti@rivosinc.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20241220083926.19453-2-yongxuan.wang@sifive.com


Signed-off-by: default avatarPalmer Dabbelt <palmer@rivosinc.com>
parent 713e788c

arch/riscv/kernel/signal.c

+0 −6
Original line number Diff line number Diff line
@@ -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;