linux-kernel - [RFC PATCH v5 01/13] ptrace: Use regset

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Message-Id: <e490cf0a1b57b7cb34a5ea1252e7a71109d6ffee.1590646208.git.greentime.hu@sifive.com>
Date:   Thu, 28 May 2020 14:40:49 +0800
From:   Greentime Hu <greentime.hu@...ive.com>
To:     greentime.hu@...ive.com, guoren@...ux.alibaba.com,
        vincent.chen@...ive.com, paul.walmsley@...ive.com,
        palmerdabbelt@...gle.com, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, oleg@...hat.com
Subject: [RFC PATCH v5 01/13] ptrace: Use regset_size() for dynamic regset

This patch uses regset_size() instead of using regset->n and regset->size
directly. In this case, it will call the get_size() ported by arch
dynamically to support dynamic regset size case.

Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
---
 kernel/ptrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/ptrace.c b/kernel/ptrace.c
index 43d6179508d6..946b2c4ec4fa 100644
--- a/kernel/ptrace.c
+++ b/kernel/ptrace.c
@@ -888,7 +888,7 @@ static int ptrace_regset(struct task_struct *task, int req, unsigned int type,
 
 	regset_no = regset - view->regsets;
 	kiov->iov_len = min(kiov->iov_len,
-			    (__kernel_size_t) (regset->n * regset->size));
+			    (__kernel_size_t) regset_size(task, regset));
 
 	if (req == PTRACE_GETREGSET)
 		return copy_regset_to_user(task, view, regset_no, 0,
-- 
2.26.2