gcov: Disable gcov build with GCC 10
[ Upstream commit cfc905f158
]
GCOV built with GCC 10 doesn't initialize n_function variable. This
produces different kernel panics as was seen by Colin in Ubuntu and me
in FC 32.
As a workaround, let's disable GCOV build for broken GCC 10 version.
Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891288
Link: https://lore.kernel.org/lkml/20200827133932.3338519-1-leon@kernel.org
Link: https://lore.kernel.org/lkml/CAHk-=whbijeSdSvx-Xcr0DPMj0BiwhJ+uiNnDSVZcr_h_kg7UA@mail.gmail.com/
Cc: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -4,6 +4,7 @@ menu "GCOV-based kernel profiling"
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config GCOV_KERNEL
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bool "Enable gcov-based kernel profiling"
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depends on DEBUG_FS
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depends on !CC_IS_GCC || GCC_VERSION < 100000
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select CONSTRUCTORS if !UML
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default n
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---help---
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