From ae7617f0ef1820be033eef93859a6bb6174a843f Mon Sep 17 00:00:00 2001 From: Tvrtko Ursulin Date: Wed, 27 Sep 2017 17:41:38 +0100 Subject: drm/i915: Allow optimized platform checks If we store the platform as a bitmask, and convert the IS_PLATFORM macro to use it, we allow the compiler to merge the IS_PLATFORM(a) || IS_PLATFORM(b) || ... checks into a single conditional. As a secondary benefit this saves almost 1k of text: text data bss dec hex filename -1460254 60014 3656 1523924 1740d4 drivers/gpu/drm/i915/i915.ko +1459260 60026 3656 1522942 173cfe drivers/gpu/drm/i915/i915.ko v2: Removed the infamous -1. Signed-off-by: Tvrtko Ursulin Cc: Jani Nikula Reviewed-by: Chris Wilson Acked-by: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/20170927164138.15474-1-tvrtko.ursulin@linux.intel.com --- drivers/gpu/drm/i915/i915_drv.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/gpu/drm/i915/i915_drv.c') diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c index 7056bb299dc6..59ac9199b35d 100644 --- a/drivers/gpu/drm/i915/i915_drv.c +++ b/drivers/gpu/drm/i915/i915_drv.c @@ -870,6 +870,10 @@ static int i915_driver_init_early(struct drm_i915_private *dev_priv, memcpy(device_info, match_info, sizeof(*device_info)); device_info->device_id = dev_priv->drm.pdev->device; + BUILD_BUG_ON(INTEL_MAX_PLATFORMS > + sizeof(device_info->platform_mask) * BITS_PER_BYTE); + device_info->platform_mask = BIT(device_info->platform); + BUG_ON(device_info->gen > sizeof(device_info->gen_mask) * BITS_PER_BYTE); device_info->gen_mask = BIT(device_info->gen - 1); -- cgit v1.2.3-55-g7522