[Intel-gfx] [PATCH v7 8/8] drm/i915: Remove truncation warning for large objects

[Gwan-gyeong Mun]

From: Chris Wilson <chris at chris-wilson.co.uk>

Having addressed the issues surrounding incorrect types for local
variables and potential integer truncation in using the scatterlist API,
we have closed all the loop holes we had previously identified with
dangerously large object creation. As such, we can eliminate the warning
put in place to remind us to complete the review.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
Cc: Brian Welty <brian.welty at intel.com>
Cc: Matthew Auld <matthew.auld at intel.com>
Cc: Thomas Hellström <thomas.hellstrom at linux.intel.com>
Testcase: igt at gem_create@create-massive
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/4991
Reviewed-by: Nirmoy Das <nirmoy.das at intel.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab at kernel.org>
Reviewed-by: Andrzej Hajda <andrzej.hajda at intel.com>
---
 drivers/gpu/drm/i915/gem/i915_gem_object.h | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.h b/drivers/gpu/drm/i915/gem/i915_gem_object.h
index 0cf31adbfd41..dd2762da332f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.h
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.h
@@ -20,25 +20,10 @@
 
 enum intel_region_id;
 
-/*
- * XXX: There is a prevalence of the assumption that we fit the
- * object's page count inside a 32bit _signed_ variable. Let's document
- * this and catch if we ever need to fix it. In the meantime, if you do
- * spot such a local variable, please consider fixing!
- *
- * We can check for invalidly typed locals with typecheck(), see for example
- * i915_gem_object_get_sg().
- */
-#define GEM_CHECK_SIZE_OVERFLOW(sz) \
-	GEM_WARN_ON((sz) >> PAGE_SHIFT > INT_MAX)
-
 static inline bool i915_gem_object_size_2big(u64 size)
 {
 	struct drm_i915_gem_object *obj;
 
-	if (GEM_CHECK_SIZE_OVERFLOW(size))
-		return true;
-
 	if (overflows_type(size, obj->base.size))
 		return true;
 
-- 
2.37.1