linuxkpi: Define FIELD_FIT()

Reviewed by: manu Approved by: manu Differential Revision: https://reviews.freebsd.org/D38536
2023-02-09 00:38:22 +01:00 · 2023-02-09 00:38:22 +01:00 · bf6f665081
commit bf6f665081
parent 83276e1f95
1 changed files with 3 additions and 0 deletions
--- a/sys/compat/linuxkpi/common/include/linux/bitfield.h
+++ b/sys/compat/linuxkpi/common/include/linux/bitfield.h
@ -127,6 +127,9 @@ _uX_replace_bits(8)

 #define	__bf_shf(x)	(__builtin_ffsll(x) - 1)

+#define	FIELD_FIT(_mask, _value)					\
+	(!(((typeof(_mask))(_value) << __bf_shf(_mask)) & ~(_mask)))
+
 #define	FIELD_PREP(_mask, _value)					\
 	(((typeof(_mask))(_value) << __bf_shf(_mask)) & (_mask))