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[76.210.143.223]) by smtp.gmail.com with ESMTPSA id n7-20020a170903110700b0016bdeb58611sm594285plh.112.2022.07.20.22.40.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Jul 2022 22:40:15 -0700 (PDT) Date: Wed, 20 Jul 2022 22:40:15 -0700 (PDT) X-Google-Original-Date: Wed, 20 Jul 2022 19:47:37 PDT (-0700) Subject: Re: [RFC PATCH riscv/for-next 2/4] riscv: export patch_insn_write In-Reply-To: <20220529143315.3678563-3-andy.chiu@sifive.com> CC: linux-riscv@lists.infradead.org, mingo@redhat.com, Paul Walmsley , aou@eecs.berkeley.edu, rostedt@goodmis.org, guoren@linux.alibaba.com, andy.chiu@sifive.com, greentime.hu@sifive.com, zong.li@sifive.com From: Palmer Dabbelt To: andy.chiu@sifive.com Message-ID: Mime-Version: 1.0 (MHng) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220720_224027_448029_A39B3280 X-CRM114-Status: GOOD ( 16.09 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On Sun, 29 May 2022 07:33:13 PDT (-0700), andy.chiu@sifive.com wrote: > So that we may patch code without issuing fence.i > > Signed-off-by: Andy Chiu > Reviewed-by: Greentime Hu > Reviewed-by: Zong Li > --- > arch/riscv/include/asm/patch.h | 1 + > arch/riscv/kernel/patch.c | 4 ++-- > 2 files changed, 3 insertions(+), 2 deletions(-) > > diff --git a/arch/riscv/include/asm/patch.h b/arch/riscv/include/asm/patch.h > index 9a7d7346001e..327e99114d67 100644 > --- a/arch/riscv/include/asm/patch.h > +++ b/arch/riscv/include/asm/patch.h > @@ -6,6 +6,7 @@ > #ifndef _ASM_RISCV_PATCH_H > #define _ASM_RISCV_PATCH_H > > +int patch_insn_write(void *addr, const void *insn, size_t len); > int patch_text_nosync(void *addr, const void *insns, size_t len); > int patch_text(void *addr, u32 insn); > > diff --git a/arch/riscv/kernel/patch.c b/arch/riscv/kernel/patch.c > index 0b552873a577..834855cfd0fb 100644 > --- a/arch/riscv/kernel/patch.c > +++ b/arch/riscv/kernel/patch.c > @@ -49,7 +49,7 @@ static void patch_unmap(int fixmap) > } > NOKPROBE_SYMBOL(patch_unmap); > > -static int patch_insn_write(void *addr, const void *insn, size_t len) > +int patch_insn_write(void *addr, const void *insn, size_t len) > { > void *waddr = addr; > bool across_pages = (((uintptr_t) addr & ~PAGE_MASK) + len) > PAGE_SIZE; > @@ -78,7 +78,7 @@ static int patch_insn_write(void *addr, const void *insn, size_t len) > } > NOKPROBE_SYMBOL(patch_insn_write); > #else > -static int patch_insn_write(void *addr, const void *insn, size_t len) > +int patch_insn_write(void *addr, const void *insn, size_t len) > { > return copy_to_kernel_nofault(addr, insn, len); > } Reviewed-by: Palmer Dabbelt _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv