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yaffs: add interface to cleancache

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Cleancache requires a small amount of code to be added
to a filesystem's implementation so that clean page
cache pages from a filesystem of that type may be
recognized and stored in/retrieved from cleancache.

Change-Id: I94c3fc8817ab66e2c54f7b2c6c474dd2321d9806
Signed-off-by: Larry Bassel <lbassel@codeaurora.org>
This commit is contained in:
Larry Bassel
2012-02-02 10:24:58 -08:00
parent 4ff0cf3ef5
commit eb93161d97
1 changed files with 8 additions and 0 deletions
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8
fs/yaffs2/yaffs_vfs.c
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@@ -53,6 +53,7 @@
#include <linux/kthread.h> #include <linux/kthread.h>
#include <linux/delay.h> #include <linux/delay.h>
#include <linux/freezer.h> #include <linux/freezer.h>
#include <linux/cleancache.h>
#include <asm/div64.h> #include <asm/div64.h>
@@ -1139,6 +1140,10 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
(unsigned)(pg->index << PAGE_CACHE_SHIFT), (unsigned)(pg->index << PAGE_CACHE_SHIFT),
(unsigned)PAGE_CACHE_SIZE); (unsigned)PAGE_CACHE_SIZE);
ret = cleancache_get_page(pg);
if (!ret)
goto cleancache_got;
obj = yaffs_dentry_to_obj(f->f_dentry); obj = yaffs_dentry_to_obj(f->f_dentry);
dev = obj->my_dev; dev = obj->my_dev;
@@ -1158,11 +1163,13 @@ static int yaffs_readpage_nolock(struct file *f, struct page *pg)
if (ret >= 0) if (ret >= 0)
ret = 0; ret = 0;
cleancache_got:
if (ret) { if (ret) {
ClearPageUptodate(pg); ClearPageUptodate(pg);
SetPageError(pg); SetPageError(pg);
} else { } else {
SetPageUptodate(pg); SetPageUptodate(pg);
SetPageMappedToDisk(pg);
ClearPageError(pg); ClearPageError(pg);
} }
@@ -2364,6 +2371,7 @@ static struct super_block *yaffs_internal_read_super(int yaffs_version,
dev->is_checkpointed); dev->is_checkpointed);
yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done"); yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done");
cleancache_init_fs(sb);
return sb; return sb;
} }