diff mbox series

[RFC,v5,01/13] ptrace: Use regset_size() for dynamic regset

Message ID e490cf0a1b57b7cb34a5ea1252e7a71109d6ffee.1590646208.git.greentime.hu@sifive.com (mailing list archive)
State New, archived
Headers show
Series riscv: Add vector ISA support | expand

Commit Message

Greentime Hu May 28, 2020, 6:40 a.m. UTC 
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@sifive.com>
---
 kernel/ptrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Oleg Nesterov May 28, 2020, 12:36 p.m. UTC | #1 
On 05/28, Greentime Hu wrote:
>
> --- 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));

Acked-by: Oleg Nesterov <oleg@redhat.com>
diff mbox series

Patch

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,