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[73.69.118.222]) by smtp.gmail.com with ESMTPSA id c204sm13342030qkb.90.2019.10.16.13.00.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Oct 2019 13:00:46 -0700 (PDT) From: Pavel Tatashin To: pasha.tatashin@soleen.com, jmorris@namei.org, sashal@kernel.org, ebiederm@xmission.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, corbet@lwn.net, catalin.marinas@arm.com, will@kernel.org, linux-arm-kernel@lists.infradead.org, marc.zyngier@arm.com, james.morse@arm.com, vladimir.murzin@arm.com, matthias.bgg@gmail.com, bhsharma@redhat.com, linux-mm@kvack.org, mark.rutland@arm.com, steve.capper@arm.com, rfontana@redhat.com, tglx@linutronix.de Subject: [PATCH v7 06/25] arm64: hibernate: use get_safe_page directly Date: Wed, 16 Oct 2019 16:00:15 -0400 Message-Id: <20191016200034.1342308-7-pasha.tatashin@soleen.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191016200034.1342308-1-pasha.tatashin@soleen.com> References: <20191016200034.1342308-1-pasha.tatashin@soleen.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191016_130048_240667_DA5FAFFF X-CRM114-Status: GOOD ( 11.87 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:743 listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org create_safe_exec_page() uses hibernate's allocator to create a set of page table to map a single page that will contain the relocation code. Remove the allocator related arguments, and use get_safe_page directly, as it is done in other local functions in this file to simplify function prototype. Removing this function pointer makes it easier to refactor the code later. Signed-off-by: Pavel Tatashin Reviewed-by: Matthias Brugger --- arch/arm64/kernel/hibernate.c | 17 +++++++---------- 1 file changed, 7 insertions(+), 10 deletions(-) diff --git a/arch/arm64/kernel/hibernate.c b/arch/arm64/kernel/hibernate.c index ef46ce66d7e8..34297716643f 100644 --- a/arch/arm64/kernel/hibernate.c +++ b/arch/arm64/kernel/hibernate.c @@ -196,9 +196,7 @@ EXPORT_SYMBOL(arch_hibernation_header_restore); */ static int create_safe_exec_page(void *src_start, size_t length, unsigned long dst_addr, - phys_addr_t *phys_dst_addr, - void *(*allocator)(gfp_t mask), - gfp_t mask) + phys_addr_t *phys_dst_addr) { int rc = 0; pgd_t *trans_pgd; @@ -206,7 +204,7 @@ static int create_safe_exec_page(void *src_start, size_t length, pud_t *pudp; pmd_t *pmdp; pte_t *ptep; - unsigned long dst = (unsigned long)allocator(mask); + unsigned long dst = get_safe_page(GFP_ATOMIC); if (!dst) { rc = -ENOMEM; @@ -216,7 +214,7 @@ static int create_safe_exec_page(void *src_start, size_t length, memcpy((void *)dst, src_start, length); __flush_icache_range(dst, dst + length); - trans_pgd = allocator(mask); + trans_pgd = (void *)get_safe_page(GFP_ATOMIC); if (!trans_pgd) { rc = -ENOMEM; goto out; @@ -224,7 +222,7 @@ static int create_safe_exec_page(void *src_start, size_t length, pgdp = pgd_offset_raw(trans_pgd, dst_addr); if (pgd_none(READ_ONCE(*pgdp))) { - pudp = allocator(mask); + pudp = (void *)get_safe_page(GFP_ATOMIC); if (!pudp) { rc = -ENOMEM; goto out; @@ -234,7 +232,7 @@ static int create_safe_exec_page(void *src_start, size_t length, pudp = pud_offset(pgdp, dst_addr); if (pud_none(READ_ONCE(*pudp))) { - pmdp = allocator(mask); + pmdp = (void *)get_safe_page(GFP_ATOMIC); if (!pmdp) { rc = -ENOMEM; goto out; @@ -244,7 +242,7 @@ static int create_safe_exec_page(void *src_start, size_t length, pmdp = pmd_offset(pudp, dst_addr); if (pmd_none(READ_ONCE(*pmdp))) { - ptep = allocator(mask); + ptep = (void *)get_safe_page(GFP_ATOMIC); if (!ptep) { rc = -ENOMEM; goto out; @@ -530,8 +528,7 @@ int swsusp_arch_resume(void) */ rc = create_safe_exec_page(__hibernate_exit_text_start, exit_size, (unsigned long)hibernate_exit, - &phys_hibernate_exit, - (void *)get_safe_page, GFP_ATOMIC); + &phys_hibernate_exit); if (rc) { pr_err("Failed to create safe executable page for hibernate_exit code.\n"); goto out;