diff options
| author |   Dan Williams <dan.j.williams@intel.com> | 2021-06-08 17:16:11 -0700 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2021-06-08 17:16:11 -0700 |
| commit | 54ada34b4dfdb864ac602e13ff87581abe517ce9 (patch) | |
| tree | 8c92ca68c13e86b71f9cbf05a1a432c3ba4ea67b /include/linux/const.h | |
| parent | cxl/pci: Fixup devm_cxl_iomap_block() to take a 'struct device *' (diff) | |
| parent | ACPICA: Add the CFMWS structure definition to the CEDT table (diff) | |
Merge branch 'rafael/acpica/cfmws' into for-5.14/cxl
Pick up the definition of the CXL Fixed Memory Window Structure from
Rafael's ACPICA development branch.
Diffstat (limited to 'include/linux/const.h')
| -rw-r--r-- | include/linux/const.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/const.h b/include/linux/const.h index 81b8aae5a855..435ddd72d2c4 100644 --- a/include/linux/const.h +++ b/include/linux/const.h @@ -3,4 +3,12 @@ #include <vdso/const.h> +/* + * This returns a constant expression while determining if an argument is + * a constant expression, most importantly without evaluating the argument. + * Glory to Martin Uecker <Martin.Uecker@med.uni-goettingen.de> + */ +#define __is_constexpr(x) \ + (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8))) + #endif /* _LINUX_CONST_H */ |