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[2003:d0:af0c:d200:6033:13d7:beea:72d6]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ab7c62c464dsm300440466b.28.2025.02.10.22.34.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2025 22:34:15 -0800 (PST) From: Markus Theil To: linux-kernel@vger.kernel.org, andi.shyti@linux.intel.com Cc: intel-gfx@lists.freedesktop.org, netdev@vger.kernel.org, Jason@zx2c4.com, tytso@mit.edu, Markus Theil Subject: [PATCH v2 1/3] drm/i915/selftests: use prandom in selftest Date: Tue, 11 Feb 2025 07:33:30 +0100 Message-ID: <20250211063332.16542-2-theil.markus@gmail.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20250211063332.16542-1-theil.markus@gmail.com> References: <20250211063332.16542-1-theil.markus@gmail.com> MIME-Version: 1.0 X-Mailman-Approved-At: Wed, 12 Feb 2025 14:10:13 +0000 X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This is part of a prandom cleanup, which removes next_pseudo_random32 and replaces it with the standard PRNG. Signed-off-by: Markus Theil --- drivers/gpu/drm/i915/selftests/i915_gem.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/selftests/i915_gem.c b/drivers/gpu/drm/i915/selftests/i915_gem.c index 0727492576be..14efa6edd9e6 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem.c @@ -45,13 +45,15 @@ static void trash_stolen(struct drm_i915_private *i915) struct i915_ggtt *ggtt = to_gt(i915)->ggtt; const u64 slot = ggtt->error_capture.start; const resource_size_t size = resource_size(&i915->dsm.stolen); + struct rnd_state prng; unsigned long page; - u32 prng = 0x12345678; /* XXX: fsck. needs some more thought... */ if (!i915_ggtt_has_aperture(ggtt)) return; + prandom_seed_state(&prng, 0x12345678); + for (page = 0; page < size; page += PAGE_SIZE) { const dma_addr_t dma = i915->dsm.stolen.start + page; u32 __iomem *s; @@ -64,8 +66,7 @@ static void trash_stolen(struct drm_i915_private *i915) s = io_mapping_map_atomic_wc(&ggtt->iomap, slot); for (x = 0; x < PAGE_SIZE / sizeof(u32); x++) { - prng = next_pseudo_random32(prng); - iowrite32(prng, &s[x]); + iowrite32(prandom_u32_state(&prng), &s[x]); } io_mapping_unmap_atomic(s); }