lkml.org 
[lkml]   [2015]   [Apr]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86/signal: Remove pax argument from restore_sigcontext

* Brian Gerst <brgerst@gmail.com> wrote:

> On Sat, Apr 4, 2015 at 10:14 AM, Ingo Molnar <mingo@kernel.org> wrote:
> >
> > * Brian Gerst <brgerst@gmail.com> wrote:
> >
> >> The pax argument is unnecesary. Instead, store the RAX value directly
> >> in regs.
> >>
> >> Signed-off-by: Brian Gerst <brgerst@gmail.com>
> >> Cc: Ingo Molnar <mingo@kernel.org>
> >> Cc: "H. Peter Anvin" <hpa@zytor.com>
> >> Cc: Andy Lutomirski <luto@amacapital.net>
> >> Cc: Denys Vlasenko <dvlasenk@redhat.com>
> >> Cc: Linus Torvalds <torvalds@linux-foundation.org>
> >> Cc: Borislav Petkov <bp@alien8.de>
> >> Cc: x86@kernel.org
> >> Cc: linux-kernel@vger.kernel.org
> >> ---
> >> arch/x86/ia32/ia32_signal.c | 17 ++++++-----------
> >> arch/x86/include/asm/sighandling.h | 4 +---
> >> arch/x86/kernel/signal.c | 22 ++++++++--------------
> >> 3 files changed, 15 insertions(+), 28 deletions(-)
> >>
> >> diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
> >> index 1f5e2b0..c81d35e6 100644
> >> --- a/arch/x86/ia32/ia32_signal.c
> >> +++ b/arch/x86/ia32/ia32_signal.c
> >> @@ -161,8 +161,7 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
> >> }
> >>
> >> static int ia32_restore_sigcontext(struct pt_regs *regs,
> >> - struct sigcontext_ia32 __user *sc,
> >> - unsigned int *pax)
> >> + struct sigcontext_ia32 __user *sc)
> >> {
> >> unsigned int tmpflags, err = 0;
> >> void __user *buf;
> >> @@ -184,7 +183,7 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
> >> RELOAD_SEG(es);
> >>
> >> COPY(di); COPY(si); COPY(bp); COPY(sp); COPY(bx);
> >> - COPY(dx); COPY(cx); COPY(ip);
> >> + COPY(dx); COPY(cx); COPY(ip); COPY(ax);
> >> /* Don't touch extended registers */
> >>
> >> COPY_SEG_CPL3(cs);
> >> @@ -197,8 +196,6 @@ static int ia32_restore_sigcontext(struct pt_regs *regs,
> >>
> >> get_user_ex(tmp, &sc->fpstate);
> >> buf = compat_ptr(tmp);
> >> -
> >> - get_user_ex(*pax, &sc->ax);
> >> } get_user_catch(err);
> >
> > Note that arch/x86/kernel/signal.c appears to have a similar pattern -
> > and there it could be removed as well?
>
> I'm guessing you didn't read the whole patch, because I did change it.

Yes :-/

Ingo


\
 
 \ /
  Last update: 2015-04-05 07:41    [W:0.053 / U:0.528 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site