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Mon, 09 Dec 2024 18:41:41 -0800 (PST) Date: Mon, 9 Dec 2024 18:41:12 -0800 In-Reply-To: <20241210024119.2488608-1-kaleshsingh@google.com> Mime-Version: 1.0 References: <20241210024119.2488608-1-kaleshsingh@google.com> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Message-ID: <20241210024119.2488608-11-kaleshsingh@google.com> Subject: [PATCH mm-unstable 10/17] mm: s390: Introduce arch_mmap_hint() From: Kalesh Singh To: akpm@linux-foundation.org, vbabka@suse.cz, yang@os.amperecomputing.com, riel@surriel.com, david@redhat.com Cc: linux@armlinux.org.uk, tsbogend@alpha.franken.de, James.Bottomley@HansenPartnership.com, ysato@users.sourceforge.jp, dalias@libc.org, glaubitz@physik.fu-berlin.de, davem@davemloft.net, andreas@gaisler.com, tglx@linutronix.de, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com, bhelgaas@google.com, jason.andryuk@amd.com, leitao@debian.org, linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linux-parisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-mm@kvack.org, kernel-team@android.com, android-mm@google.com, Kalesh Singh X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241209_184143_009801_2103D915 X-CRM114-Status: GOOD ( 12.66 ) X-Spam-Score: -9.5 (---------) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Introduce s390 arch_mmap_hint() and define HAVE_ARCH_MMAP_HINT. This is a preparatory patch, no functional change is introduced. Signed-off-by: Kalesh Singh --- arch/s390/include/asm/pgtable.h | 1 + arch/s390/mm/mmap.c | 32 ++++++++++++++++ 2 files changed, 17 insertions(+), 16 deletions [...] Content analysis details: (-9.5 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:104a listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -7.5 USER_IN_DEF_DKIM_WL From: address is in the default DKIM welcome-list -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] -0.0 DKIMWL_WL_MED DKIMwl.org - Medium trust sender X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org Introduce s390 arch_mmap_hint() and define HAVE_ARCH_MMAP_HINT. This is a preparatory patch, no functional change is introduced. Signed-off-by: Kalesh Singh --- arch/s390/include/asm/pgtable.h | 1 + arch/s390/mm/mmap.c | 32 ++++++++++++++++---------------- 2 files changed, 17 insertions(+), 16 deletions(-) diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 48268095b0a3..eaecb558ab9b 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1997,6 +1997,7 @@ extern void s390_reset_cmma(struct mm_struct *mm); /* s390 has a private copy of get unmapped area to deal with cache synonyms */ #define HAVE_ARCH_UNMAPPED_AREA #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN +#define HAVE_ARCH_MMAP_HINT #define pmd_pgtable(pmd) \ ((pgtable_t)__va(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE)) diff --git a/arch/s390/mm/mmap.c b/arch/s390/mm/mmap.c index 33f3504be90b..3f82401b77cd 100644 --- a/arch/s390/mm/mmap.c +++ b/arch/s390/mm/mmap.c @@ -83,12 +83,21 @@ static int get_align_mask(struct file *filp, unsigned long flags) return 0; } +unsigned long arch_mmap_hint(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + if (len > TASK_SIZE - mmap_min_addr) + return 0; + + return generic_mmap_hint(filp, addr, len, pgoff, flags); +} + unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags, vm_flags_t vm_flags) { struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; struct vm_unmapped_area_info info = {}; if (len > TASK_SIZE - mmap_min_addr) @@ -97,13 +106,9 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, if (flags & MAP_FIXED) goto check_asce_limit; - if (addr) { - addr = PAGE_ALIGN(addr); - vma = find_vma(mm, addr); - if (TASK_SIZE - len >= addr && addr >= mmap_min_addr && - (!vma || addr + len <= vm_start_gap(vma))) - goto check_asce_limit; - } + addr = arch_mmap_hint(filp, addr, len, pgoff, flags); + if (addr) + goto check_asce_limit; info.length = len; info.low_limit = mm->mmap_base; @@ -123,7 +128,6 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned long ad unsigned long len, unsigned long pgoff, unsigned long flags, vm_flags_t vm_flags) { - struct vm_area_struct *vma; struct mm_struct *mm = current->mm; struct vm_unmapped_area_info info = {}; @@ -135,13 +139,9 @@ unsigned long arch_get_unmapped_area_topdown(struct file *filp, unsigned long ad goto check_asce_limit; /* requesting a specific address */ - if (addr) { - addr = PAGE_ALIGN(addr); - vma = find_vma(mm, addr); - if (TASK_SIZE - len >= addr && addr >= mmap_min_addr && - (!vma || addr + len <= vm_start_gap(vma))) - goto check_asce_limit; - } + addr = arch_mmap_hint(filp, addr, len, pgoff, flags); + if (addr) + goto check_asce_limit; info.flags = VM_UNMAPPED_AREA_TOPDOWN; info.length = len;