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| author | Ingo Molnar <mingo@kernel.org> | 2015-09-05 09:32:39 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-09-08 10:03:58 +0200 |
| commit | 530e5c827182a7a5322c55276b0617fd06874c24 (patch) | |
| tree | 5f9e042204b3d78fd3276dca0ceef59ef4fc6205 /arch/x86/kernel/signal.c | |
| parent | f2c609bca0b6526810fa22330ce4d173cc023ef8 (diff) | |
| download | linux-530e5c827182a7a5322c55276b0617fd06874c24.tar.gz | |
x86/headers: Make sigcontext pointers bit independent
Before we can eliminate the duplication between 'struct sigcontext_32' and 'struct sigcontext_ia32', make the 'fpstate' pointer field in 'struct sigcontext_32' bit independent. Acked-by: Mikko Rapeli <mikko.rapeli@iki.fi> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/1441438363-9999-12-git-send-email-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/signal.c')
| -rw-r--r-- | arch/x86/kernel/signal.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c index da52e6bb5c7f..3724ff38033e 100644 --- a/arch/x86/kernel/signal.c +++ b/arch/x86/kernel/signal.c @@ -63,6 +63,7 @@ int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc) { + unsigned long buf_val; void __user *buf; unsigned int tmpflags; unsigned int err = 0; @@ -107,7 +108,8 @@ int restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc) regs->flags = (regs->flags & ~FIX_EFLAGS) | (tmpflags & FIX_EFLAGS); regs->orig_ax = -1; /* disable syscall checks */ - get_user_ex(buf, &sc->fpstate); + get_user_ex(buf_val, &sc->fpstate); + buf = (void __user *)buf_val; } get_user_catch(err); err |= fpu__restore_sig(buf, config_enabled(CONFIG_X86_32)); |