[PATCH v5 19/27] mm: Introduce do_mmap_locked()
From: Yu-cheng Yu <hidden>
Date: 2018-10-11 15:23:33
Also in:
linux-api, linux-arch, linux-doc, linux-mm
Subsystem:
memory management - core, the rest · Maintainers:
Andrew Morton, David Hildenbrand, Linus Torvalds
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 <redacted> --- include/linux/mm.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index f658923e76ad..de55f367852e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h@@ -2318,6 +2318,24 @@ 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(unsigned long addr, + unsigned long len, unsigned long prot, unsigned long flags, + vm_flags_t vm_flags) +{ + struct mm_struct *mm = current->mm; + unsigned long populate; + + down_write(&mm->mmap_sem); + addr = do_mmap(NULL, addr, len, prot, flags, vm_flags, 0, + &populate, NULL); + 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