From: Al Viro <viro@ZenIV.linux.org.uk>
To: Christoph Hellwig <hch@lst.de>
Cc: arve@android.com, riandrews@android.com,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 01/16] ashmem: switch to ->read_iter
Date: Wed, 30 Aug 2017 16:28:55 +0100 [thread overview]
Message-ID: <20170830152855.GL5426@ZenIV.linux.org.uk> (raw)
In-Reply-To: <20170830150007.3953-2-hch@lst.de>
On Wed, Aug 30, 2017 at 04:59:52PM +0200, Christoph Hellwig wrote:
> And use the proper VFS helper for using the backing file.
Actually, I wonder if that update of ->f_pos of the underlying file is
correct. That's unrelated to this patch, but might be worth sorting
out while we are at it.
How about
mutex_unlock(&ashmem_mutex);
/*
* asma and asma->file are used outside the lock here. We assume
* once asma->file is set it will never be changed, and will not
* be destroyed until all references to the file are dropped and
* ashmem_release is called.
*/
ret = vfs_iter_read(asma->file, iter, &iocb->ki_pos, 0);
mutex_lock(&ashmem_mutex);
if (ret >= 0)
asma->file->f_pos = *pos;
out_unlock:
mutex_unlock(&ashmem_mutex);
return ret;
in there?
next prev parent reply other threads:[~2017-08-30 15:28 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-30 14:59 switch in-kernel read/write calls to kernel_read/write Christoph Hellwig
2017-08-30 14:59 ` [PATCH 01/16] ashmem: switch to ->read_iter Christoph Hellwig
2017-08-30 15:28 ` Al Viro [this message]
2017-09-01 10:20 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 02/16] autofs4: switch autofs4_write to __kernel_write Christoph Hellwig
2017-08-30 15:30 ` Al Viro
2017-09-01 10:22 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 03/16] fs: move kernel_write to fs/read_write.c Christoph Hellwig
2017-08-30 14:59 ` [PATCH 04/16] fs: move kernel_read " Christoph Hellwig
2017-08-30 14:59 ` [PATCH 05/16] fs: fix kernel_read prototype Christoph Hellwig
2017-08-30 15:37 ` Al Viro
2017-09-01 10:37 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 06/16] fs: fix kernel_write prototype Christoph Hellwig
2017-08-30 15:39 ` Al Viro
2017-09-01 10:40 ` Christoph Hellwig
2017-08-30 14:59 ` [PATCH 07/16] serial2002: switch serial2002_tty_write to kernel_{read/write} Christoph Hellwig
2017-08-30 14:59 ` [PATCH 08/16] mm/nommu: switch do_mmap_private to kernel_read Christoph Hellwig
2017-08-30 15:41 ` Al Viro
2017-09-01 10:41 ` Christoph Hellwig
2017-08-30 15:00 ` [PATCH 09/16] net/9p: switch p9_fd_read to kernel_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 10/16] btrfs: switch write_buf " Christoph Hellwig
2017-08-30 15:35 ` Nikolay Borisov
2017-08-30 15:00 ` [PATCH 11/16] mconsole: switch to kernel_read Christoph Hellwig
2017-08-30 15:00 ` [PATCH 12/16] gadget/f_mass_storage: stop messing with the address limit Christoph Hellwig
2017-08-30 15:00 ` [PATCH 13/16] lustre: switch to kernel_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 14/16] fs: unexport __vfs_read/__vfs_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 15/16] fs: unexport vfs_read and vfs_write Christoph Hellwig
2017-08-30 15:00 ` [PATCH 16/16] fs: unexport vfs_readv and vfs_writev Christoph Hellwig
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