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Sun, 04 Oct 2026 11:48:30 -0700 (PDT) Received: from ryzen.lan ([2601:644:8000:7a86::e35]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-351270204e0sm7754374eec.1.2026.10.04.11.48.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 04 Oct 2026 11:48:30 -0700 (PDT) From: Rosen Penev To: linux-mips@vger.kernel.org Cc: John Crispin , Sergio Paracuellos , Thomas Bogendoerfer , Matthias Brugger , AngeloGioacchino Del Regno , Rosen Penev , linux-kernel@vger.kernel.org (open list:ARM/Mediatek SoC support), linux-arm-kernel@lists.infradead.org (moderated list:ARM/Mediatek SoC support), linux-mediatek@lists.infradead.org (moderated list:ARM/Mediatek SoC support) Subject: [PATCH] mips: ralink: mt7621: avoid casting away __iomem in wraparound test Date: Sun, 4 Oct 2026 11:48:28 -0700 Message-ID: <20261004184828.31284-1-rosenp@gmail.com> X-Mailer: git-send-email 2.56.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261004_114832_762369_B4FABB3F X-CRM114-Status: GOOD ( 11.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org CPHYSADDR() casts its argument to an integer, which strips the __iomem annotation from dm and triggers a sparse warning. Compute the physical address from detect_magic directly. The result is unchanged since the sum never exceeds the 512MB KSEG mask. Fixes: 4ddaf88aadd3 ("mips: ralink: mt7621: add missing __iomem") Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202610041411.uJXWXF8i-lkp@intel.com/ Assisted-by: LLM Signed-off-by: Rosen Penev --- arch/mips/ralink/mt7621.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/ralink/mt7621.c b/arch/mips/ralink/mt7621.c index ae7b8cfedd5f..2d10c74b13c1 100644 --- a/arch/mips/ralink/mt7621.c +++ b/arch/mips/ralink/mt7621.c @@ -65,7 +65,7 @@ static bool __init mt7621_addr_wraparound_test(phys_addr_t size) { void __iomem *dm = (void __iomem *)KSEG1ADDR(&detect_magic); - if (CPHYSADDR(dm + size) >= MT7621_LOWMEM_MAX_SIZE) + if (CPHYSADDR(&detect_magic) + size >= MT7621_LOWMEM_MAX_SIZE) return true; __raw_writel(MT7621_MEM_TEST_PATTERN, dm); if (__raw_readl(dm) != __raw_readl(dm + size)) -- 2.56.0