Skip to content
Projects
Groups
Snippets
Help
Loading...
Help
Support
Keyboard shortcuts
?
Submit feedback
Contribute to GitLab
Sign in / Register
Toggle navigation
L
linux
Project overview
Project overview
Details
Activity
Releases
Repository
Repository
Files
Commits
Branches
Tags
Contributors
Graph
Compare
Issues
0
Issues
0
List
Boards
Labels
Milestones
Merge Requests
0
Merge Requests
0
Analytics
Analytics
Repository
Value Stream
Wiki
Wiki
Snippets
Snippets
Members
Members
Collapse sidebar
Close sidebar
Activity
Graph
Create a new issue
Commits
Issue Boards
Open sidebar
Kirill Smelkov
linux
Commits
ea460046
Commit
ea460046
authored
Nov 02, 2002
by
Christoph Hellwig
Browse files
Options
Browse Files
Download
Email Patches
Plain Diff
[PATCH] page_alloc.c uClinux bits
nommu ports need to set a reference on all allocated pages.
parent
ad0ec372
Changes
1
Hide whitespace changes
Inline
Side-by-side
Showing
1 changed file
with
22 additions
and
7 deletions
+22
-7
mm/page_alloc.c
mm/page_alloc.c
+22
-7
No files found.
mm/page_alloc.c
View file @
ea460046
...
...
@@ -213,14 +213,29 @@ expand(struct zone *zone, struct page *page,
return
page
;
}
static
inline
void
set_page_refs
(
struct
page
*
page
,
int
order
)
{
#ifdef CONFIG_MMU
set_page_count
(
page
,
1
);
#else
int
i
;
/*
* We need to reference all the pages for this order, otherwise if
* anyone accesses one of the pages with (get/put) it will be freed.
*/
for
(
i
=
0
;
i
<
(
1
<<
order
);
i
++
)
set_page_count
(
page
+
i
,
1
);
#endif
/* CONFIG_MMU */
}
/*
* This page is about to be returned from the page allocator
*/
static
void
prep_new_page
(
struct
page
*
page
)
static
void
prep_new_page
(
struct
page
*
page
,
int
order
)
{
if
(
page
->
mapping
||
page_mapped
(
page
)
||
(
page
->
flags
&
(
if
(
page
->
mapping
||
page_mapped
(
page
)
||
(
page
->
flags
&
(
1
<<
PG_private
|
1
<<
PG_locked
|
1
<<
PG_lru
|
...
...
@@ -232,7 +247,7 @@ static void prep_new_page(struct page *page)
page
->
flags
&=
~
(
1
<<
PG_uptodate
|
1
<<
PG_error
|
1
<<
PG_referenced
|
1
<<
PG_arch_1
|
1
<<
PG_checked
);
set_page_
count
(
page
,
1
);
set_page_
refs
(
page
,
order
);
}
/*
...
...
@@ -299,7 +314,7 @@ static int rmqueue_bulk(struct zone *zone, unsigned int order,
list_for_each
(
curr
,
&
temp
)
{
page
=
list_entry
(
curr
,
struct
page
,
list
);
BUG_ON
(
bad_range
(
zone
,
page
));
prep_new_page
(
page
);
prep_new_page
(
page
,
order
);
}
list_splice
(
&
temp
,
list
->
prev
);
return
allocated
;
...
...
@@ -390,7 +405,7 @@ static struct page *buffered_rmqueue(struct zone *zone, int order, int cold)
if
(
page
!=
NULL
)
{
BUG_ON
(
bad_range
(
zone
,
page
));
prep_new_page
(
page
);
prep_new_page
(
page
,
order
);
}
return
page
;
}
...
...
Write
Preview
Markdown
is supported
0%
Try again
or
attach a new file
Attach a file
Cancel
You are about to add
0
people
to the discussion. Proceed with caution.
Finish editing this message first!
Cancel
Please
register
or
sign in
to comment