The patch titled
split mmap
has been added to the -mm tree. Its filename is
split-mmap.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: split mmap
From: Miklos Szeredi <mszeredi@xxxxxxx>
This is a straightforward split of do_mmap_pgoff() into two functions:
- do_mmap_pgoff() checks the parameters, and calculates the vma
flags. Then it calls
- mmap_region(), which does the actual mapping
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxx>
Acked-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/mm.h | 4 ++++
mm/mmap.c | 27 ++++++++++++++++++++-------
2 files changed, 24 insertions(+), 7 deletions(-)
diff -puN include/linux/mm.h~split-mmap include/linux/mm.h
--- a/include/linux/mm.h~split-mmap
+++ a/include/linux/mm.h
@@ -1075,6 +1075,10 @@ extern unsigned long get_unmapped_area(s
extern unsigned long do_mmap_pgoff(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot,
unsigned long flag, unsigned long pgoff);
+extern unsigned long mmap_region(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long flags,
+ unsigned int vm_flags, unsigned long pgoff,
+ int accountable);
static inline unsigned long do_mmap(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot,
diff -puN mm/mmap.c~split-mmap mm/mmap.c
--- a/mm/mmap.c~split-mmap
+++ a/mm/mmap.c
@@ -893,14 +893,11 @@ unsigned long do_mmap_pgoff(struct file
unsigned long flags, unsigned long pgoff)
{
struct mm_struct * mm = current->mm;
- struct vm_area_struct * vma, * prev;
struct inode *inode;
unsigned int vm_flags;
- int correct_wcount = 0;
int error;
- struct rb_node ** rb_link, * rb_parent;
int accountable = 1;
- unsigned long charged = 0, reqprot = prot;
+ unsigned long reqprot = prot;
/*
* Does the application expect PROT_READ to imply PROT_EXEC?
@@ -1025,7 +1022,25 @@ unsigned long do_mmap_pgoff(struct file
error = security_file_mmap(file, reqprot, prot, flags);
if (error)
return error;
-
+
+ return mmap_region(file, addr, len, flags, vm_flags, pgoff,
+ accountable);
+}
+EXPORT_SYMBOL(do_mmap_pgoff);
+
+unsigned long mmap_region(struct file *file, unsigned long addr,
+ unsigned long len, unsigned long flags,
+ unsigned int vm_flags, unsigned long pgoff,
+ int accountable)
+{
+ struct mm_struct *mm = current->mm;
+ struct vm_area_struct *vma, *prev;
+ int correct_wcount = 0;
+ int error;
+ struct rb_node **rb_link, *rb_parent;
+ unsigned long charged = 0;
+ struct inode *inode = file ? file->f_path.dentry->d_inode : NULL;
+
/* Clear old maps */
error = -ENOMEM;
munmap_back:
@@ -1170,8 +1185,6 @@ unacct_error:
return error;
}
-EXPORT_SYMBOL(do_mmap_pgoff);
-
/* Get an address range which is currently unmapped.
* For shmat() with addr=0.
*
_
Patches currently in -mm which might be from mszeredi@xxxxxxx are
fuse-validate-rootmode-mount-option.patch
split-mmap.patch
only-allow-nonlinear-vmas-for-ram-backed-filesystems.patch
fix-quadratic-behavior-of-shrink_dcache_parent.patch
mm-shrink-parent-dentries-when-shrinking-slab.patch
add-filesystem-subtype-support.patch
add-file-position-info-to-proc.patch
add-file-position-info-to-proc-fix.patch
consolidate-generic_writepages-and-mpage_writepages.patch
-
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