From: Al Viro <viro@zeniv.linux.org.uk>
To: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Ira Weiny <ira.weiny@intel.com>
Subject: Re: [PATCH v3 4/4] fs/sysv: Replace kmap() with kmap_local_page()
Date: Fri, 20 Jan 2023 00:54:06 +0000 [thread overview]
Message-ID: <Y8nmLh0cyloTzfAN@ZenIV> (raw)
In-Reply-To: <20230119153232.29750-5-fmdefrancesco@gmail.com>
On Thu, Jan 19, 2023 at 04:32:32PM +0100, Fabio M. De Francesco wrote:
> @@ -228,6 +239,12 @@ int sysv_delete_entry(struct sysv_dir_entry *de, struct page *page)
> {
> struct inode *inode = page->mapping->host;
> loff_t pos = page_offset(page) + offset_in_page(de);
> + /*
> + * The "de" dentry points somewhere in the same page whose we need the
> + * address of; therefore, we can simply get the base address "kaddr" by
> + * masking the previous with PAGE_MASK.
> + */
> + char *kaddr = (char *)((unsigned long)de & PAGE_MASK);
er... ITYM "therefore we can pass de to dir_put_page() and get rid of that kaddr
thing"...
Anyway, with that change the series rebased and applied on top of Christoph's sysv
patch.
next prev parent reply other threads:[~2023-01-20 0:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-19 15:32 [PATCH v3 0/4] fs/sysv: Replace kmap() with kmap_local_page() Fabio M. De Francesco
2023-01-19 15:32 ` [PATCH v3 1/4] fs/sysv: Use the offset_in_page() helper Fabio M. De Francesco
2023-01-19 15:32 ` [PATCH v3 2/4] fs/sysv: Change the signature of dir_get_page() Fabio M. De Francesco
2023-01-19 15:32 ` [PATCH v3 3/4] fs/sysv: Use dir_put_page() in sysv_rename() Fabio M. De Francesco
2023-01-19 15:32 ` [PATCH v3 4/4] fs/sysv: Replace kmap() with kmap_local_page() Fabio M. De Francesco
2023-01-20 0:54 ` Al Viro [this message]
2023-01-20 4:21 ` Al Viro
2023-01-20 4:28 ` Matthew Wilcox
2023-01-20 4:45 ` Al Viro
2023-01-20 4:54 ` Matthew Wilcox
2023-01-20 5:07 ` Al Viro
2023-01-20 5:56 ` Al Viro
2023-01-20 7:17 ` Helge Deller
2023-01-21 8:05 ` Ira Weiny
2023-01-21 10:57 ` Helge Deller
2023-01-21 19:26 ` Al Viro
2023-01-23 17:14 ` Fabio M. De Francesco
2023-01-24 20:16 ` Ira Weiny
2023-01-23 17:03 ` Fabio M. De Francesco
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