From mboxrd@z Thu Jan 1 00:00:00 1970 From: ira.weiny@intel.com Date: Fri, 9 Oct 2020 12:50:08 -0700 Subject: [Intel-wired-lan] [PATCH RFC PKS/PMEM 33/58] fs/cramfs: Utilize new kmap_thread() In-Reply-To: <20201009195033.3208459-1-ira.weiny@intel.com> References: <20201009195033.3208459-1-ira.weiny@intel.com> Message-ID: <20201009195033.3208459-34-ira.weiny@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: intel-wired-lan@osuosl.org List-ID: From: Ira Weiny The kmap() calls in this FS are localized to a single thread. To avoid the over head of global PKRS updates use the new kmap_thread() call. Cc: Nicolas Pitre Signed-off-by: Ira Weiny --- fs/cramfs/inode.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/fs/cramfs/inode.c b/fs/cramfs/inode.c index 912308600d39..003c014a42ed 100644 --- a/fs/cramfs/inode.c +++ b/fs/cramfs/inode.c @@ -247,8 +247,8 @@ static void *cramfs_blkdev_read(struct super_block *sb, unsigned int offset, struct page *page = pages[i]; if (page) { - memcpy(data, kmap(page), PAGE_SIZE); - kunmap(page); + memcpy(data, kmap_thread(page), PAGE_SIZE); + kunmap_thread(page); put_page(page); } else memset(data, 0, PAGE_SIZE); @@ -826,7 +826,7 @@ static int cramfs_readpage(struct file *file, struct page *page) maxblock = (inode->i_size + PAGE_SIZE - 1) >> PAGE_SHIFT; bytes_filled = 0; - pgdata = kmap(page); + pgdata = kmap_thread(page); if (page->index < maxblock) { struct super_block *sb = inode->i_sb; @@ -914,13 +914,13 @@ static int cramfs_readpage(struct file *file, struct page *page) memset(pgdata + bytes_filled, 0, PAGE_SIZE - bytes_filled); flush_dcache_page(page); - kunmap(page); + kunmap_thread(page); SetPageUptodate(page); unlock_page(page); return 0; err: - kunmap(page); + kunmap_thread(page); ClearPageUptodate(page); SetPageError(page); unlock_page(page); -- 2.28.0.rc0.12.gb6a658bd00c9