From: Liu Bo <bo.li.liu@oracle.com>
Date: Wed, 17 Jun 2015 08:59:58 +0000 (+0800)
Subject: Btrfs: fix warning of bytes_may_use
X-Git-Tag: omap-for-v4.2/fixes-rc2-v2~20^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ddba1bfc2369cd0566bcfdab47599834a32d1c19;p=pandora-kernel.git

Btrfs: fix warning of bytes_may_use

While running generic/019, dmesg got several warnings from
btrfs_free_reserved_data_space().

Test generic/019 produces some disk failures so sumbit dio will get errors,
in which case, btrfs_direct_IO() goes to the error handling and free
bytes_may_use, but the problem is that bytes_may_use has been free'd
during get_block().

This adds a runtime flag to show if we've gone through get_block(), if so,
don't do the cleanup work.

Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
---

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