From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161057AbcFIVTG (ORCPT ); Thu, 9 Jun 2016 17:19:06 -0400 Received: from youngberry.canonical.com ([91.189.89.112]:51099 "EHLO youngberry.canonical.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753040AbcFIVS7 (ORCPT ); Thu, 9 Jun 2016 17:18:59 -0400 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: James Hogan , Arnd Bergmann , Ralf Baechle , Petr Malat , Tony Luck , Fenghua Yu , Christopher Ferris , linux-arch@vger.kernel.org, linux-mips@linux-mips.org, linux-ia64@vger.kernel.org, Kamal Mostafa Subject: [PATCH 4.2.y-ckt 099/206] SIGNAL: Move generic copy_siginfo() to signal.h Date: Thu, 9 Jun 2016 14:15:08 -0700 Message-Id: <1465507015-23052-100-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1465507015-23052-1-git-send-email-kamal@canonical.com> References: <1465507015-23052-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 4.2 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.2.8-ckt12 -stable review patch. If anyone has any objections, please let me know. ---8<------------------------------------------------------------ From: James Hogan commit ca9eb49aa9562eaadf3cea071ec7018ad6800425 upstream. The generic copy_siginfo() is currently defined in asm-generic/siginfo.h, after including uapi/asm-generic/siginfo.h which defines the generic struct siginfo. However this makes it awkward for an architecture to use it if it has to define its own struct siginfo (e.g. MIPS and potentially IA64), since it means that asm-generic/siginfo.h can only be included after defining the arch-specific siginfo, which may be problematic if the arch-specific definition needs definitions from uapi/asm-generic/siginfo.h. It is possible to work around this by first including uapi/asm-generic/siginfo.h to get the constants before defining the arch-specific siginfo, and include asm-generic/siginfo.h after. However uapi headers can't be included by other uapi headers, so that first include has to be in an ifdef __kernel__, with the non __kernel__ case including the non-UAPI header instead. Instead of that mess, move the generic copy_siginfo() definition into linux/signal.h, which allows an arch-specific uapi/asm/siginfo.h to include asm-generic/siginfo.h and define the arch-specific siginfo, and for the generic copy_siginfo() to see that arch-specific definition. Signed-off-by: James Hogan Cc: Arnd Bergmann Cc: Ralf Baechle Cc: Petr Malat Cc: Tony Luck Cc: Fenghua Yu Cc: Christopher Ferris Cc: linux-arch@vger.kernel.org Cc: linux-mips@linux-mips.org Cc: linux-ia64@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/12478/ Signed-off-by: Ralf Baechle Signed-off-by: Kamal Mostafa --- include/asm-generic/siginfo.h | 15 --------------- include/linux/signal.h | 15 +++++++++++++++ 2 files changed, 15 insertions(+), 15 deletions(-) diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h index 3d1a3af..a2508a8 100644 --- a/include/asm-generic/siginfo.h +++ b/include/asm-generic/siginfo.h @@ -17,21 +17,6 @@ struct siginfo; void do_schedule_next_timer(struct siginfo *info); -#ifndef HAVE_ARCH_COPY_SIGINFO - -#include - -static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) -{ - if (from->si_code < 0) - memcpy(to, from, sizeof(*to)); - else - /* _sigchld is currently the largest know union member */ - memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld)); -} - -#endif - extern int copy_siginfo_to_user(struct siginfo __user *to, const struct siginfo *from); #endif diff --git a/include/linux/signal.h b/include/linux/signal.h index 92557bb..d80259a 100644 --- a/include/linux/signal.h +++ b/include/linux/signal.h @@ -28,6 +28,21 @@ struct sigpending { sigset_t signal; }; +#ifndef HAVE_ARCH_COPY_SIGINFO + +#include + +static inline void copy_siginfo(struct siginfo *to, struct siginfo *from) +{ + if (from->si_code < 0) + memcpy(to, from, sizeof(*to)); + else + /* _sigchld is currently the largest know union member */ + memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld)); +} + +#endif + /* * Define some primitives to manipulate sigset_t. */ -- 2.7.4