Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752841Ab1BCD1n (ORCPT ); Wed, 2 Feb 2011 22:27:43 -0500 Received: from e23smtp06.au.ibm.com ([202.81.31.148]:44970 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751009Ab1BCD1l (ORCPT ); Wed, 2 Feb 2011 22:27:41 -0500 From: "Ian Munsie" To: linux-kernel@vger.kernel.org Cc: Andreas Dilger , Dave Kleikamp , Andrew Morton , Jiri Kosina , Jason Baron , linuxppc-dev , Steven Rostedt , Alexander Graf , Ingo Molnar , Paul Mackerras , KOSAKI Motohiro , Frederic Weisbecker , Scott Wood , Nathan Lynch , Avantika Mathur , David Gibson , Andreas Schwab , Namhyung Kim Subject: PowerPC, ftrace: Add PPC raw syscall tracepoints & ftrace fixes (mimimal subset only) v4 Date: Thu, 3 Feb 2011 14:27:19 +1100 Message-Id: <1296703645-18718-1-git-send-email-imunsie@au1.ibm.com> X-Mailer: git-send-email 1.7.2.3 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2241 Lines: 51 Hi All, This is a partial version of my 'ftrace syscalls, PowerPC: Various fixes, Compat Syscall support and PowerPC implementation'. This is updated from yesterday with arch_syscall_addr changed to a static inline function from Steven's suggestion. This subset implements the raw syscall tracepoints on PowerPC which has been requested recently. It also fixes ftrace syscalls to ensure that events will only be created for syscalls that successfully map their metadata to a syscall number, so that non-working phantom events are not created. Patches #2 and #6 in this series are not strictly necessary for this, they just optimise ftrace syscalls a bit. What's missing from this series that was in the full 40 patch v2 series is the conversion of all the syscalls implemented under /arch/powerpc, Jason Baron's compat syscall support and the conversion of the remaining native and compat syscalls to this infrastructure. Cheers, -Ian Changelog: Subset v4: - Changed arch_syscall_addr to a static inline function from Steven's suggestion. Archs implementing their own function must now define ARCH_HAS_SYSCALL_MATCH_SYM_NAME in their asm/ftrace.h Subset v3: - Rather than removing the redundant syscall_nr checks completely, I have turned them into WARN_ON_ONCE to catch possible future regressions, from Steven Rostedt's suggestion. - From Mike Frysinger's suggestion, arch_syscall_addr is now a macro rather than a weak function to minimise the overhead at boot. Archs with special requirements (such as ppc64) can define their own macro in asm/ftrace.h. Steven Rostedt suggested this be made a static inline function, but I don't see how this would be possible (at least without #defines and #ifndefs) given that it has to be weak to allow archs to override it (Unless I misunderstood something? Steven?). Subset v2: - Minimal unchanged subset from 'ftrace syscalls, PowerPC: Various fixes, Compat Syscall support and PowerPC implementation' v2 patch series. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/