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better fix for older compiler than gcc 5

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Reference: kernel's include/linux/compiler_attributes.h
This commit is contained in:
Hin-Tak Leung 2020-12-04 23:20:13 +00:00
parent 28b9319379
commit 267152505b
1 changed files with 5 additions and 1 deletions
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6
sound-compatible-4.18.h
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@ -16,7 +16,11 @@
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(5,4,0)
#if defined(__has_attribute) && __has_attribute(__fallthrough__)
#ifndef __has_attribute
# define __has_attribute(x) __GCC4_has_attribute_##x
# define __GCC4_has_attribute___fallthrough__ 0
#endif
#if __has_attribute(__fallthrough__)
# define fallthrough __attribute__((__fallthrough__))
#else
# define fallthrough do {} while (0) /* fallthrough */