From patchwork Wed Dec 13 00:08:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Al Viro X-Patchwork-Id: 13490180 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linux.org.uk header.i=@linux.org.uk header.b="A01MbGvs" Received: from zeniv.linux.org.uk (zeniv.linux.org.uk [IPv6:2a03:a000:7:0:5054:ff:fe1c:15ff]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 16E28D6E; Tue, 12 Dec 2023 16:08:53 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=linux.org.uk; s=zeniv-20220401; h=Sender:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description; bh=rvXeUqtEC+dRyenBVr0uZJ7uutUWHkARWVLiznoStTU=; b=A01MbGvsdycCUVwNSggJnOKrG4 FnmZb47R5fhWo6XRI14Jr6Np34m/QSuOOAZDAloM8Lfuon9BQ4FFZzXWRLpMNpt0Iz87M5sNXfLwj bJAxA5OHeil8MPxAZUWE/pv3iGvehTekO4ajOEKWEO5cvLHtzWWKheEUN6k2yvWmxZ7gEJXeCL7ET Hgio+iMND7jL3aL+z6hwDFmUzyrP9/WlkIG5gxJYiSsKBANG6KRwVLyBtgfbW9XnMILBx2Et53QTI ThVPU10apMf0y2ezAWTHbm2aBVISQha1kwpVNV6gG17d4JjLKL1N/DLXo+OS7D8yWBbTQ+qPPLBNA WIN80OCw==; Received: from viro by zeniv.linux.org.uk with local (Exim 4.96 #2 (Red Hat Linux)) id 1rDCny-00BX29-1d; Wed, 13 Dec 2023 00:08:50 +0000 From: Al Viro To: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 4/4] minixfs: switch to kmap_local_page() Date: Wed, 13 Dec 2023 00:08:49 +0000 Message-Id: <20231213000849.2748576-4-viro@zeniv.linux.org.uk> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231213000849.2748576-1-viro@zeniv.linux.org.uk> References: <20231213000656.GI1674809@ZenIV> <20231213000849.2748576-1-viro@zeniv.linux.org.uk> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: Al Viro Again, a counterpart of Fabio's fs/sysv patch Signed-off-by: Al Viro Reviewed-by: Fabio M. De Francesco --- fs/minix/dir.c | 27 +++++++++++++-------------- fs/minix/minix.h | 5 ----- fs/minix/namei.c | 6 +++--- 3 files changed, 16 insertions(+), 22 deletions(-) diff --git a/fs/minix/dir.c b/fs/minix/dir.c index ccb6c47fd7fe..a224cf222570 100644 --- a/fs/minix/dir.c +++ b/fs/minix/dir.c @@ -70,9 +70,8 @@ static void *dir_get_page(struct inode *dir, unsigned long n, struct page **p) struct page *page = read_mapping_page(mapping, n, NULL); if (IS_ERR(page)) return ERR_CAST(page); - kmap(page); *p = page; - return page_address(page); + return kmap_local_page(page); } static inline void *minix_next_entry(void *de, struct minix_sb_info *sbi) @@ -123,13 +122,13 @@ static int minix_readdir(struct file *file, struct dir_context *ctx) unsigned l = strnlen(name, sbi->s_namelen); if (!dir_emit(ctx, name, l, inumber, DT_UNKNOWN)) { - dir_put_page(page); + unmap_and_put_page(page, p); return 0; } } ctx->pos += chunk_size; } - dir_put_page(page); + unmap_and_put_page(page, kaddr); } return 0; } @@ -189,7 +188,7 @@ minix_dirent *minix_find_entry(struct dentry *dentry, struct page **res_page) if (namecompare(namelen, sbi->s_namelen, name, namx)) goto found; } - dir_put_page(page); + unmap_and_put_page(page, kaddr); } return NULL; @@ -255,7 +254,7 @@ int minix_add_link(struct dentry *dentry, struct inode *inode) goto out_unlock; } unlock_page(page); - dir_put_page(page); + unmap_and_put_page(page, kaddr); } BUG(); return -EINVAL; @@ -278,7 +277,7 @@ int minix_add_link(struct dentry *dentry, struct inode *inode) mark_inode_dirty(dir); err = minix_handle_dirsync(dir); out_put: - dir_put_page(page); + unmap_and_put_page(page, kaddr); return err; out_unlock: unlock_page(page); @@ -324,7 +323,7 @@ int minix_make_empty(struct inode *inode, struct inode *dir) goto fail; } - kaddr = kmap_atomic(page); + kaddr = kmap_local_page(page); memset(kaddr, 0, PAGE_SIZE); if (sbi->s_version == MINIX_V3) { @@ -344,7 +343,7 @@ int minix_make_empty(struct inode *inode, struct inode *dir) de->inode = dir->i_ino; strcpy(de->name, ".."); } - kunmap_atomic(kaddr); + kunmap_local(kaddr); dir_commit_chunk(page, 0, 2 * sbi->s_dirsize); err = minix_handle_dirsync(inode); @@ -361,11 +360,11 @@ int minix_empty_dir(struct inode * inode) struct page *page = NULL; unsigned long i, npages = dir_pages(inode); struct minix_sb_info *sbi = minix_sb(inode->i_sb); - char *name; + char *name, *kaddr; __u32 inumber; for (i = 0; i < npages; i++) { - char *p, *kaddr, *limit; + char *p, *limit; kaddr = dir_get_page(inode, i, &page); if (IS_ERR(kaddr)) @@ -396,12 +395,12 @@ int minix_empty_dir(struct inode * inode) goto not_empty; } } - dir_put_page(page); + unmap_and_put_page(page, kaddr); } return 1; not_empty: - dir_put_page(page); + unmap_and_put_page(page, kaddr); return 0; } @@ -455,7 +454,7 @@ ino_t minix_inode_by_name(struct dentry *dentry) res = ((minix3_dirent *) de)->inode; else res = de->inode; - dir_put_page(page); + unmap_and_put_page(page, de); } return res; } diff --git a/fs/minix/minix.h b/fs/minix/minix.h index cb42b6cf7909..d493507c064f 100644 --- a/fs/minix/minix.h +++ b/fs/minix/minix.h @@ -64,11 +64,6 @@ extern int V2_minix_get_block(struct inode *, long, struct buffer_head *, int); extern unsigned V1_minix_blocks(loff_t, struct super_block *); extern unsigned V2_minix_blocks(loff_t, struct super_block *); -static inline void dir_put_page(struct page *page) -{ - kunmap(page); - put_page(page); -} extern struct minix_dir_entry *minix_find_entry(struct dentry*, struct page**); extern int minix_add_link(struct dentry*, struct inode*); extern int minix_delete_entry(struct minix_dir_entry*, struct page*); diff --git a/fs/minix/namei.c b/fs/minix/namei.c index 20923a15e30a..d6031acc34f0 100644 --- a/fs/minix/namei.c +++ b/fs/minix/namei.c @@ -149,7 +149,7 @@ static int minix_unlink(struct inode * dir, struct dentry *dentry) if (!de) return -ENOENT; err = minix_delete_entry(de, page); - dir_put_page(page); + unmap_and_put_page(page, de); if (err) return err; @@ -242,9 +242,9 @@ static int minix_rename(struct mnt_idmap *idmap, } out_dir: if (dir_de) - dir_put_page(dir_page); + unmap_and_put_page(dir_page, dir_de); out_old: - dir_put_page(old_page); + unmap_and_put_page(old_page, old_de); out: return err; }