From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yu-cheng Yu Subject: [PATCH v8 18/27] mm: Introduce do_mmap_locked() Date: Tue, 13 Aug 2019 13:52:16 -0700 Message-ID: <20190813205225.12032-19-yu-cheng.yu@intel.com> References: <20190813205225.12032-1-yu-cheng.yu@intel.com> Return-path: In-Reply-To: <20190813205225.12032-1-yu-cheng.yu@intel.com> Sender: linux-kernel-owner@vger.kernel.org To: x86@kernel.org, "H. Peter Anvin" , Thomas Gleixner , Ingo Molnar , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-api@vger.kernel.org, Arnd Bergmann , Andy Lutomirski , Balbir Singh , Borislav Petkov , Cyrill Gorcunov , Dave Hansen , Eugene Syromiatnikov , Florian Weimer , "H.J. Lu" , Jann Horn , Jonathan Corbet , Kees Cook , Mike Kravetz , Nadav Amit Cc: Yu-cheng Yu List-Id: linux-api@vger.kernel.org There are a few places that need do_mmap() with mm->mmap_sem held. Create an in-line function for that. Signed-off-by: Yu-cheng Yu --- include/linux/mm.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index bc58585014c9..275c385f53c6 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2394,6 +2394,24 @@ static inline void mm_populate(unsigned long addr, unsigned long len) static inline void mm_populate(unsigned long addr, unsigned long len) {} #endif +static inline unsigned long do_mmap_locked(struct file *file, + unsigned long addr, unsigned long len, unsigned long prot, + unsigned long flags, vm_flags_t vm_flags, struct list_head *uf) +{ + struct mm_struct *mm = current->mm; + unsigned long populate; + + down_write(&mm->mmap_sem); + addr = do_mmap(file, addr, len, prot, flags, vm_flags, 0, + &populate, uf); + up_write(&mm->mmap_sem); + + if (populate) + mm_populate(addr, populate); + + return addr; +} + /* These take the mm semaphore themselves */ extern int __must_check vm_brk(unsigned long, unsigned long); extern int __must_check vm_brk_flags(unsigned long, unsigned long, unsigned long); -- 2.17.1