ext4: fix BUG when calling ext4_error with locked block group
The mballoc code likes to call ext4_error while it is holding locked block groups. This can causes a scheduling in atomic context BUG. We can't just unlock the block group and relock it after/if ext4_error returns since that might result in race conditions in the case where the filesystem is set to continue after finding errors. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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