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2 commits

Author SHA1 Message Date
Hans Petter Selasky
d2890eeea1 Implement the array_size() function in the LinuxKPI. This function
basically multiplies its two arguments and returns SIZE_MAX if the
result overflows the size_t type.  Else the product of the two
arguments is returned.

Bump the FreeBSD_version to mitigate issues with existing
implementation of array_size() in drm-devel-kmod.

Discussed with:		manu@
MFC after:		1 week
Sponsored by:		Mellanox Technologies
2020-07-10 11:27:54 +00:00
Emmanuel Vadot
8287045dde linuxkpi: Add overflow.h
Only add check_add_overflow and check_mul_overflow as those are the only
two needed function by DRM v5.3.
Both gcc and clang have builtin to do this check so use them directly
but throw an error if the compiler/code checker doesn't support this builtin.

Sponsored-by: The FreeBSD Foundation
Reviewed by:	hselsasky
Differential Revision:	https://reviews.freebsd.org/D25015
2020-05-27 09:31:50 +00:00