Issue #3021 has been reported by dcb.
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Bug #3021: sys/dev/drm/i915/i915_gem_stolen.c:115]: (error) Signed integer
overflow for expression '65535<<20'
http://bugs.dragonflybsd.org/issues/3021
* Author: dcb
* Status: New
* Priority: Normal
* Assignee:
* Category:
* Target version:
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Source code is
base = bsm & BSM_MASK;
but
$ fgrep BSM_MASK `find dragonfly/sys/dev -name \*.h -print`
dragonfly/sys/dev/drm/i915/i915_reg.h:#define BSM_MASK (0xFFFF << 20)
$
Macro BSM_MASK seems to be 36 bits wide, which won't fit into a 32 bit int.
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