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Rao" To: Steven Rostedt , Michael Ellerman Subject: [RFC PATCH 08/14] powerpc/ftrace: Use FTRACE_REGS_ADDR to identify the correct ftrace trampoline Date: Thu, 26 Nov 2020 23:38:45 +0530 Message-Id: <136410660b5b6ff6ceb63d683496b6517103c01c.1606412433.git.naveen.n.rao@linux.vnet.ibm.com> X-Mailer: git-send-email 2.25.4 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312, 18.0.737 definitions=2020-11-26_08:2020-11-26, 2020-11-26 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 impostorscore=0 priorityscore=1501 mlxlogscore=915 clxscore=1015 malwarescore=0 suspectscore=0 bulkscore=0 phishscore=0 adultscore=0 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2011260108 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Use FTRACE_REGS_ADDR instead of keying off CONFIG_DYNAMIC_FTRACE_WITH_REGS to identify the proper ftrace trampoline address to use. Signed-off-by: Naveen N. Rao --- arch/powerpc/kernel/trace/ftrace.c | 12 ++---------- 1 file changed, 2 insertions(+), 10 deletions(-) diff --git a/arch/powerpc/kernel/trace/ftrace.c b/arch/powerpc/kernel/trace/ftrace.c index 4fe5f373172fd2..14b39f7797d455 100644 --- a/arch/powerpc/kernel/trace/ftrace.c +++ b/arch/powerpc/kernel/trace/ftrace.c @@ -361,11 +361,7 @@ static int setup_mcount_compiler_tramp(unsigned long tramp) } /* Let's re-write the tramp to go to ftrace_[regs_]caller */ -#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS - ptr = ppc_global_function_entry((void *)ftrace_regs_caller); -#else - ptr = ppc_global_function_entry((void *)ftrace_caller); -#endif + ptr = ppc_global_function_entry((void *)FTRACE_REGS_ADDR); if (create_branch(&instr, (void *)tramp, ptr, 0)) { pr_debug("%ps is not reachable from existing mcount tramp\n", (void *)ptr); @@ -885,11 +881,7 @@ int __init ftrace_dyn_arch_init(void) 0x7d8903a6, /* mtctr r12 */ 0x4e800420, /* bctr */ }; -#ifdef CONFIG_DYNAMIC_FTRACE_WITH_REGS - unsigned long addr = ppc_global_function_entry((void *)ftrace_regs_caller); -#else - unsigned long addr = ppc_global_function_entry((void *)ftrace_caller); -#endif + unsigned long addr = ppc_global_function_entry((void *)FTRACE_REGS_ADDR); long reladdr = addr - kernel_toc_addr(); if (reladdr > 0x7FFFFFFF || reladdr < -(0x80000000L)) { -- 2.25.4