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Compiler warnings can catch bugs at compile time; thus, heeding them is usually a good idea. Turn warnings into errors by default for the kublk build so that anyone making changes is forced to heed them. Compiler warnings can also sometimes produce annoying false positives, so provide a flag WERROR that the developer can use as follows to have the build and selftests run go through even if there are warnings: make WERROR=0 TARGETS=ublk kselftest Signed-off-by: Uday Shankar <ushankar@purestorage.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20250429-ublk_selftests-v2-1-e970b6d9e4f4@purestorage.com Signed-off-by: Jens Axboe <axboe@kernel.dk>