Re: [PATCH 18/24] netfs: Speed up buffered reading

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Simon Horman <horms@xxxxxxxxxx> wrote:

> If the code ever reaches this line, then slice will be used
> uninitialised below.

It can't actually happen (or, at least, it shouldn't).  There are only three
ways of obtaining data: downloading from the server
(NETFS_DOWNLOAD_FROM_SERVER), reading from the cache (NETFS_READ_FROM_CACHE)
and just clearing space (NETFS_FILL_WITH_ZEROES); each of those has its own
if-statement that will set 'slice' or will switch the source to a different
type that will set 'slice'.

The problem is that the compiler doesn't know this.

The check for NETFS_INVALID_READ is there just in case.  Possibly:

		if (source == NETFS_INVALID_READ)
			break;

could be replaced with a WARN_ON_ONCE() and an unconditional break.

David





[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [NTFS 3]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [NTFS 3]     [Samba]     [Device Mapper]     [CEPH Development]

  Powered by Linux