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5ec44a37c3
The RHEL5 2.6.18-194.7.1.el5 kernel added atomic64_cmpxchg to asm-x86_64/atomic.h. That macro is defined in terms of cmpxchg which is provided by asm/system.h. However, asm/system.h is not #included by atomic.h in this kernel nor by the autoconf test for atomic64_cmpxchg, so the test failed with "implicit declaration of function 'cmpxchg'". This leads the build system to erroneously conclude that the kernel does not define atomic64_cmpxchg and enable the built-in definition. This in turn produces a '"atomic64_cmpxchg" redefined' build warning which is fatal when building with --enable-debug. This commit fixes this by including asm/system.h in the autoconf test. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> |
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