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Cc: linux-raid@vger.kernel.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	maan@systemlinux.org, "Rafael J. Wysocki" <rjw@sisk.pl>,
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Subject: [dm-devel] compat_ioctl: ignore RAID_VERSION ioctl
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--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1038,6 +1038,8 @@ COMPATIBLE_IOCTL(FIOQSIZE)
 #ifdef CONFIG_BLOCK
 /* loop */
 IGNORE_IOCTL(LOOP_CLR_FD)
+/* md calls this on random blockdevs */
+IGNORE_IOCTL(RAID_VERSION)
 /* SG stuff */
 COMPATIBLE_IOCTL(SG_SET_TIMEOUT)
 COMPATIBLE_IOCTL(SG_GET_TIMEOUT)