linux-kernel - include/drm/i915_drm.h:96: possible bad bitmask ?

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Date:	Mon, 8 Aug 2016 10:31:32 +0100
From:	David Binderman <linuxdev.baldrick@...il.com>
To:	daniel.vetter@...el.com, jani.nikula@...ux.intel.com,
	David Airlie <airlied@...ux.ie>, dcb314@...mail.com,
	intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: include/drm/i915_drm.h:96: possible bad bitmask ?

Hello there,

Recent versions of gcc say this:

include/drm/i915_drm.h:96:34: warning: result of ‘65535 << 20’
requires 37 bits to represent, but ‘int’ only has 32 bits
[-Wshift-overflow=]

Source code is

#define   INTEL_BSM_MASK (0xFFFF << 20)

Maybe something like

#define   INTEL_BSM_MASK (0xFFFFUL<< 20)

might be better.


Regards

David Binderman