The patch titled
kernel-doc for mm/filemap.c
has been added to the -mm tree. Its filename is
kernel-doc-for-mm-filemapc.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: kernel-doc for mm/filemap.c
From: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
mm/filemap.c:
- add lots of kernel-doc;
- fix some typos and kernel-doc errors;
- drop some blank lines between function close and EXPORT_SYMBOL();
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
mm/filemap.c | 173 +++++++++++++++++++++++++++++++++----------------
1 file changed, 120 insertions(+), 53 deletions(-)
diff -puN mm/filemap.c~kernel-doc-for-mm-filemapc mm/filemap.c
--- a/mm/filemap.c~kernel-doc-for-mm-filemapc
+++ a/mm/filemap.c
@@ -171,15 +171,17 @@ static int sync_page(void *word)
}
/**
- * filemap_fdatawrite_range - start writeback against all of a mapping's
- * dirty pages that lie within the byte offsets <start, end>
+ * __filemap_fdatawrite_range - start writeback on mapping dirty pages in range
* @mapping: address space structure to write
* @start: offset in bytes where the range starts
* @end: offset in bytes where the range ends (inclusive)
* @sync_mode: enable synchronous operation
*
+ * Start writeback against all of a mapping's dirty pages that lie
+ * within the byte offsets <start, end> inclusive.
+ *
* If sync_mode is WB_SYNC_ALL then this is a "data integrity" operation, as
- * opposed to a regular memory * cleansing writeback. The difference between
+ * opposed to a regular memory cleansing writeback. The difference between
* these two operations is that if a dirty page/buffer is encountered, it must
* be waited upon, and not just skipped over.
*/
@@ -219,7 +221,10 @@ static int filemap_fdatawrite_range(stru
return __filemap_fdatawrite_range(mapping, start, end, WB_SYNC_ALL);
}
-/*
+/**
+ * filemap_flush - mostly a non-blocking flush
+ * @mapping: target address_space
+ *
* This is a mostly non-blocking flush. Not suitable for data-integrity
* purposes - I/O may not be started against all dirty pages.
*/
@@ -229,7 +234,12 @@ int filemap_flush(struct address_space *
}
EXPORT_SYMBOL(filemap_flush);
-/*
+/**
+ * wait_on_page_writeback_range - wait for writeback to complete
+ * @mapping: target address_space
+ * @start: beginning page index
+ * @end: ending page index
+ *
* Wait for writeback to complete against pages indexed by start->end
* inclusive
*/
@@ -276,7 +286,13 @@ int wait_on_page_writeback_range(struct
return ret;
}
-/*
+/**
+ * sync_page_range - write and wait on all pages in the passed range
+ * @inode: target inode
+ * @mapping: target address_space
+ * @pos: beginning offset in pages to write
+ * @count: number of bytes to write
+ *
* Write and wait upon all the pages in the passed range. This is a "data
* integrity" operation. It waits upon in-flight writeout before starting and
* waiting upon new writeout. If there was an IO error, return it.
@@ -305,7 +321,13 @@ int sync_page_range(struct inode *inode,
}
EXPORT_SYMBOL(sync_page_range);
-/*
+/**
+ * sync_page_range_nolock
+ * @inode: target inode
+ * @mapping: target address_space
+ * @pos: beginning offset in pages to write
+ * @count: number of bytes to write
+ *
* Note: Holding i_mutex across sync_page_range_nolock is not a good idea
* as it forces O_SYNC writers to different parts of the same file
* to be serialised right until io completion.
@@ -329,10 +351,11 @@ int sync_page_range_nolock(struct inode
EXPORT_SYMBOL(sync_page_range_nolock);
/**
- * filemap_fdatawait - walk the list of under-writeback pages of the given
- * address space and wait for all of them.
- *
+ * filemap_fdatawait - wait for all under-writeback pages to complete
* @mapping: address space structure to wait for
+ *
+ * Walk the list of under-writeback pages of the given address space
+ * and wait for all of them.
*/
int filemap_fdatawait(struct address_space *mapping)
{
@@ -368,7 +391,12 @@ int filemap_write_and_wait(struct addres
}
EXPORT_SYMBOL(filemap_write_and_wait);
-/*
+/**
+ * filemap_write_and_wait_range - write out & wait on a file range
+ * @mapping: the address_space for the pages
+ * @lstart: offset in bytes where the range starts
+ * @lend: offset in bytes where the range ends (inclusive)
+ *
* Write out and wait upon file offsets lstart->lend, inclusive.
*
* Note that `lend' is inclusive (describes the last byte to be written) so
@@ -394,8 +422,14 @@ int filemap_write_and_wait_range(struct
return err;
}
-/*
- * This function is used to add newly allocated pagecache pages:
+/**
+ * add_to_page_cache - add newly allocated pagecache pages
+ * @page: page to add
+ * @mapping: the page's address_space
+ * @offset: page index
+ * @gfp_mask: page allocation mode
+ *
+ * This function is used to add newly allocated pagecache pages;
* the page is new, so we can just run SetPageLocked() against it.
* The other page state flags were set by rmqueue().
*
@@ -422,7 +456,6 @@ int add_to_page_cache(struct page *page,
}
return error;
}
-
EXPORT_SYMBOL(add_to_page_cache);
int add_to_page_cache_lru(struct page *page, struct address_space *mapping,
@@ -489,8 +522,7 @@ void fastcall wait_on_page_bit(struct pa
EXPORT_SYMBOL(wait_on_page_bit);
/**
- * unlock_page() - unlock a locked page
- *
+ * unlock_page - unlock a locked page
* @page: the page
*
* Unlocks the page and wakes up sleepers in ___wait_on_page_locked().
@@ -513,8 +545,9 @@ void fastcall unlock_page(struct page *p
}
EXPORT_SYMBOL(unlock_page);
-/*
- * End writeback against a page.
+/**
+ * end_page_writeback - end writeback against a page
+ * @page: the page
*/
void end_page_writeback(struct page *page)
{
@@ -527,10 +560,11 @@ void end_page_writeback(struct page *pag
}
EXPORT_SYMBOL(end_page_writeback);
-/*
- * Get a lock on the page, assuming we need to sleep to get it.
+/**
+ * __lock_page - get a lock on the page, assuming we need to sleep to get it
+ * @page: the page to lock
*
- * Ugly: running sync_page() in state TASK_UNINTERRUPTIBLE is scary. If some
+ * Ugly. Running sync_page() in state TASK_UNINTERRUPTIBLE is scary. If some
* random driver's requestfn sets TASK_RUNNING, we could busywait. However
* chances are that on the second loop, the block layer's plug list is empty,
* so sync_page() will then return in state TASK_UNINTERRUPTIBLE.
@@ -544,8 +578,12 @@ void fastcall __lock_page(struct page *p
}
EXPORT_SYMBOL(__lock_page);
-/*
- * a rather lightweight function, finding and getting a reference to a
+/**
+ * find_get_page - find and get a page reference
+ * @mapping: the address_space to search
+ * @offset: the page index
+ *
+ * A rather lightweight function, finding and getting a reference to a
* hashed page atomically.
*/
struct page * find_get_page(struct address_space *mapping, unsigned long offset)
@@ -559,11 +597,14 @@ struct page * find_get_page(struct addre
read_unlock_irq(&mapping->tree_lock);
return page;
}
-
EXPORT_SYMBOL(find_get_page);
-/*
- * Same as above, but trylock it instead of incrementing the count.
+/**
+ * find_trylock_page - find and lock a page
+ * @mapping: the address_space to search
+ * @offset: the page index
+ *
+ * Same as find_get_page(), but trylock it instead of incrementing the count.
*/
struct page *find_trylock_page(struct address_space *mapping, unsigned long offset)
{
@@ -576,12 +617,10 @@ struct page *find_trylock_page(struct ad
read_unlock_irq(&mapping->tree_lock);
return page;
}
-
EXPORT_SYMBOL(find_trylock_page);
/**
* find_lock_page - locate, pin and lock a pagecache page
- *
* @mapping: the address_space to search
* @offset: the page index
*
@@ -617,12 +656,10 @@ repeat:
read_unlock_irq(&mapping->tree_lock);
return page;
}
-
EXPORT_SYMBOL(find_lock_page);
/**
* find_or_create_page - locate or add a pagecache page
- *
* @mapping: the page's address_space
* @index: the page's index into the mapping
* @gfp_mask: page allocation mode
@@ -663,7 +700,6 @@ repeat:
page_cache_release(cached_page);
return page;
}
-
EXPORT_SYMBOL(find_or_create_page);
/**
@@ -729,9 +765,16 @@ unsigned find_get_pages_contig(struct ad
return i;
}
-/*
+/**
+ * find_get_pages_tag - find and return pages that match @tag
+ * @mapping: the address_space to search
+ * @index: the starting page index
+ * @tag: the tag index
+ * @nr_pages: the maximum number of pages
+ * @pages: where the resulting pages are placed
+ *
* Like find_get_pages, except we only return pages which are tagged with
- * `tag'. We update *index to index the next page for the traversal.
+ * @tag. We update @index to index the next page for the traversal.
*/
unsigned find_get_pages_tag(struct address_space *mapping, pgoff_t *index,
int tag, unsigned int nr_pages, struct page **pages)
@@ -750,7 +793,11 @@ unsigned find_get_pages_tag(struct addre
return ret;
}
-/*
+/**
+ * grab_cache_page_nowait - returns locked page at given index in given cache
+ * @mapping: target address_space
+ * @index: the page index
+ *
* Same as grab_cache_page, but do not wait if the page is unavailable.
* This is intended for speculative data generators, where the data can
* be regenerated if the page couldn't be grabbed. This routine should
@@ -779,19 +826,25 @@ grab_cache_page_nowait(struct address_sp
}
return page;
}
-
EXPORT_SYMBOL(grab_cache_page_nowait);
-/*
+/**
+ * do_generic_mapping_read - generic file read routine
+ * @mapping: address_space to be read
+ * @_ra: file's readahead state
+ * @filp: the file to read
+ * @ppos: current file position
+ * @desc: read_descriptor
+ * @actor: read method
+ *
* This is a generic file read routine, and uses the
- * mapping->a_ops->readpage() function for the actual low-level
- * stuff.
+ * mapping->a_ops->readpage() function for the actual low-level stuff.
*
* This is really ugly. But the goto's actually try to clarify some
* of the logic when it comes to error handling etc.
*
- * Note the struct file* is only passed for the use of readpage. It may be
- * NULL.
+ * Note the struct file* is only passed for the use of readpage.
+ * It may be NULL.
*/
void do_generic_mapping_read(struct address_space *mapping,
struct file_ra_state *_ra,
@@ -1004,7 +1057,6 @@ out:
if (filp)
file_accessed(filp);
}
-
EXPORT_SYMBOL(do_generic_mapping_read);
int file_read_actor(read_descriptor_t *desc, struct page *page,
@@ -1046,7 +1098,13 @@ success:
}
EXPORT_SYMBOL(file_read_actor);
-/*
+/**
+ * __generic_file_aio_read - generic filesystem read routine
+ * @iocb: kernel I/O control block
+ * @iov: io vector request
+ * @nr_segs: number of segments in the iovec
+ * @ppos: current file position
+ *
* This is the "read()" routine for all filesystems
* that can use the page cache directly.
*/
@@ -1125,7 +1183,6 @@ __generic_file_aio_read(struct kiocb *io
out:
return retval;
}
-
EXPORT_SYMBOL(__generic_file_aio_read);
ssize_t
@@ -1136,7 +1193,6 @@ generic_file_aio_read(struct kiocb *iocb
BUG_ON(iocb->ki_pos != pos);
return __generic_file_aio_read(iocb, &local_iov, 1, &iocb->ki_pos);
}
-
EXPORT_SYMBOL(generic_file_aio_read);
ssize_t
@@ -1152,7 +1208,6 @@ generic_file_read(struct file *filp, cha
ret = wait_on_sync_kiocb(&kiocb);
return ret;
}
-
EXPORT_SYMBOL(generic_file_read);
int file_send_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size)
@@ -1193,7 +1248,6 @@ ssize_t generic_file_sendfile(struct fil
return desc.written;
return desc.error;
}
-
EXPORT_SYMBOL(generic_file_sendfile);
static ssize_t
@@ -1229,11 +1283,15 @@ asmlinkage ssize_t sys_readahead(int fd,
}
#ifdef CONFIG_MMU
-/*
+static int FASTCALL(page_cache_read(struct file * file, unsigned long offset));
+/**
+ * page_cache_read - adds requested page to the page cache if not already there
+ * @file: file to read
+ * @offset: page index
+ *
* This adds the requested page to the page cache if it isn't already there,
* and schedules an I/O to read in its contents from disk.
*/
-static int FASTCALL(page_cache_read(struct file * file, unsigned long offset));
static int fastcall page_cache_read(struct file * file, unsigned long offset)
{
struct address_space *mapping = file->f_mapping;
@@ -1260,7 +1318,12 @@ static int fastcall page_cache_read(stru
#define MMAP_LOTSAMISS (100)
-/*
+/**
+ * filemap_nopage - read in file data for page fault handling
+ * @area: the applicable vm_area
+ * @address: target address to read in
+ * @type: returned with VM_FAULT_{MINOR,MAJOR} if not %NULL
+ *
* filemap_nopage() is invoked via the vma operations vector for a
* mapped memory region to read in file data during a page fault.
*
@@ -1463,7 +1526,6 @@ page_not_uptodate:
page_cache_release(page);
return NULL;
}
-
EXPORT_SYMBOL(filemap_nopage);
static struct page * filemap_getpage(struct file *file, unsigned long pgoff,
@@ -1717,7 +1779,13 @@ repeat:
return page;
}
-/*
+/**
+ * read_cache_page - read into page cache, fill it if needed
+ * @mapping: the page's address_space
+ * @index: the page index
+ * @filler: function to perform the read
+ * @data: destination for read data
+ *
* Read into the page cache. If a page already exists,
* and PageUptodate() is not set, try to fill the page.
*/
@@ -1755,7 +1823,6 @@ retry:
out:
return page;
}
-
EXPORT_SYMBOL(read_cache_page);
/*
@@ -1855,7 +1922,7 @@ __filemap_copy_from_user_iovec(char *vad
/*
* Performs necessary checks before doing a write
*
- * Can adjust writing position aor amount of bytes to write.
+ * Can adjust writing position or amount of bytes to write.
* Returns appropriate error code that caller should return or
* zero in case that write should be allowed.
*/
_
Patches currently in -mm which might be from rdunlap@xxxxxxxxxxxx are
git-alsa.patch
git-dvb.patch
git-infiniband.patch
git-kbuild.patch
git-mtd.patch
git-netdev-all.patch
git-pcmcia.patch
lpfc-sparse-null-warnings.patch
aic7-cleanup-module_parm_desc-strings.patch
qla1280-fix-section-mismatch-warnings.patch
areca-raid-linux-scsi-driver.patch
git-watchdog.patch
slab-kmalloc-kzalloc-comments-cleanup-and-fix.patch
kernel-doc-for-mm-filemapc.patch
add-poisonh-and-patch-primary-users.patch
update-2-drivers-for-poisonh.patch
poison-add-use-more-constants.patch
add-doc-submitchecklist.patch
doc-add-audit-acct-to-docbook.patch
codingstyle-add-typedefs-chapter.patch
fix-listh-kernel-doc.patch
listh-doc-change-counter-to-control.patch
kernel-doc-drop-leading-space-in-sections.patch
kernel-doc-script-cleanups.patch
wd7000-fix-section-mismatch-warnings.patch
megaraid_mbox-fix-section-mismatch-warnings.patch
kernel-doc-mm-readhead-fixup.patch
checkstack-pirnt-module-names.patch
wan-sdla-section-fixes.patch
trident-fb-section-fixes.patch
cdrom-mcdx-section-fixes.patch
char-ip2-more-section-fixes-replacement.patch
advansys-section-fixes.patch
pi-futex-rt-mutex-docs-update.patch
acpi-identify-which-device-is-not-power-manageable.patch
-
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