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-Wunintialized was disabled in commit c562746 ("drm/i915: Disable -Wuninitialized") because there were two warnings that were false positives. The first was due to DECLARE_WAIT_QUEUE_HEAD_ONSTACK, which was fixed in LLVM 9.0.0. The second was in busywait_stop, which was fixed in LLVM 10.0.0 (issue 415). The kernel's minimum version for LLVM is 10.0.1 so this warning can be safely enabled, where it has already caught a couple bugs. Link: ClangBuiltLinux/linux#220 Link: ClangBuiltLinux/linux#415 Link: ClangBuiltLinux/linux#499 Link: llvm/llvm-project@2e04039 Link: llvm/llvm-project@c667cdc Fixes: c562746 ("drm/i915: Disable -Wuninitialized") References: 2ea4a7b ("drm/i915/gt: Avoid uninitialized use of rpcurupei in frequency_show") References: 2034c21 ("drm/i915/display: Ensure that ret is always initialized in icl_combo_phy_verify_state") Reported-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Nathan Chancellor <nathan@kernel.org> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Link: https://patchwork.freedesktop.org/patch/msgid/20210216212953.24458-1-nathan@kernel.org (cherry picked from commit b242318) Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
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