lkml.org 
[lkml]   [2019]   [Aug]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v8 18/27] mm: Introduce do_mmap_locked()
Date
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 <yu-cheng.yu@intel.com>
---
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
\
 
 \ /
  Last update: 2019-08-13 23:11    [W:0.131 / U:1.932 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site