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HWCAP_CRC32 is defined by the linux kernel source. so it's defined as long as the linux kernel source is new enough. but the compiler on the building host is not necessarily able to build the `crc32cx` instruction. if we happen to have an incapable compiler on a machine with recent linux kernel source, the dummy "ceph_crc32c_aarch64()" will be selected by `ceph_choose_crc32()`. and it always return 0. See-also: http://tracker.ceph.com/issues/19705 Signed-off-by: Kefu Chai <kchai@redhat.com> |
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arm.c | ||
arm.h | ||
intel.c | ||
intel.h | ||
ppc.c | ||
ppc.h | ||
probe.cc | ||
probe.h |