From: Julian Braha julianbraha@gmail.com
stable inclusion from stable-v5.10.107 commit ebe106eac68675a1e6373723d0d8765a6adf3290 bugzilla: https://gitee.com/openeuler/kernel/issues/I574A2
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 11c57c3ba94da74c3446924260e34e0b1950b5d7 ]
Resending this to properly add it to the patch tracker - thanks for letting me know, Arnd :)
When ARM is enabled, and BITREVERSE is disabled, Kbuild gives the following warning:
WARNING: unmet direct dependencies detected for HAVE_ARCH_BITREVERSE Depends on [n]: BITREVERSE [=n] Selected by [y]: - ARM [=y] && (CPU_32v7M [=n] || CPU_32v7 [=y]) && !CPU_32v6 [=n]
This is because ARM selects HAVE_ARCH_BITREVERSE without selecting BITREVERSE, despite HAVE_ARCH_BITREVERSE depending on BITREVERSE.
This unmet dependency bug was found by Kismet, a static analysis tool for Kconfig. Please advise if this is not the appropriate solution.
Signed-off-by: Julian Braha julianbraha@gmail.com Signed-off-by: Russell King (Oracle) rmk+kernel@armlinux.org.uk Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yu Liao liaoyu15@huawei.com Reviewed-by: Wei Li liwei391@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- lib/Kconfig | 1 - 1 file changed, 1 deletion(-)
diff --git a/lib/Kconfig b/lib/Kconfig index b46a9fd122c8..9216e24e5164 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -45,7 +45,6 @@ config BITREVERSE config HAVE_ARCH_BITREVERSE bool default n - depends on BITREVERSE help This option enables the use of hardware bit-reversal instructions on architectures which support such operations.