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Sat, 25 Mar 2023 05:29:34 -0700 (PDT) From: Nicholas Piggin To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 8/8] powerpc: copy_thread don't set PPR in user interrupt frame regs Date: Sat, 25 Mar 2023 22:29:04 +1000 Message-Id: <20230325122904.2375060-9-npiggin@gmail.com> X-Mailer: git-send-email 2.37.2 In-Reply-To: <20230325122904.2375060-1-npiggin@gmail.com> References: <20230325122904.2375060-1-npiggin@gmail.com> MIME-Version: 1.0 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: Nicholas Piggin Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" syscalls do not set the PPR field in their interrupt frame and return from syscall always sets the default PPR for userspace, so setting the value in the ret_from_fork frame is not necessary and mildly inconsistent. Remove it. Signed-off-by: Nicholas Piggin --- arch/powerpc/kernel/process.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c index 4140b25f489f..52e18cec865b 100644 --- a/arch/powerpc/kernel/process.c +++ b/arch/powerpc/kernel/process.c @@ -1812,11 +1812,6 @@ int copy_thread(struct task_struct *p, const struct kernel_clone_args *args) f = ret_from_fork; } -#ifdef CONFIG_PPC64 - if (cpu_has_feature(CPU_FTR_HAS_PPR)) - childregs->ppr = DEFAULT_PPR; -#endif - childregs->msr &= ~(MSR_FP|MSR_VEC|MSR_VSX); p->thread.regs = childregs; }