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s=korg; t=1650285825; bh=ubE5cBK1u0KST/FYIMyU80MCab6kYD84Od29l4/064s=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iRNB7H/P4lioids253pLS5tpqq0KmwKcWQVUsMeqhmzaVliZnGqFUI4MiOWum59uY AWkuSSSk8ZJ4Oc1iEseIk4EHrpxSX4UhwPx4B+WyVIw2QuVkhd56SOs9908c7kFIIV k3KcySo8EYUZ/bp0BXcAEqz/ggtNTFT8LqL8oAbw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Borislav Petkov , Frank Li , Will Deacon , Mark Rutland , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , linux-arm-kernel@lists.infradead.org, Sasha Levin Subject: [PATCH 5.4 36/63] perf/imx_ddr: Fix undefined behavior due to shift overflowing the constant Date: Mon, 18 Apr 2022 14:13:33 +0200 Message-Id: <20220418121136.656965830@linuxfoundation.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220418121134.149115109@linuxfoundation.org> References: <20220418121134.149115109@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Borislav Petkov [ Upstream commit d02b4dd84e1a90f7f1444d027c0289bf355b0d5a ] Fix: In file included from :0:0: In function ‘ddr_perf_counter_enable’, inlined from ‘ddr_perf_irq_handler’ at drivers/perf/fsl_imx8_ddr_perf.c:651:2: ././include/linux/compiler_types.h:352:38: error: call to ‘__compiletime_assert_729’ \ declared with attribute error: FIELD_PREP: mask is not constant _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ... See https://lore.kernel.org/r/YkwQ6%2BtIH8GQpuct@zn.tnic for the gory details as to why it triggers with older gccs only. Signed-off-by: Borislav Petkov Cc: Frank Li Cc: Will Deacon Cc: Mark Rutland Cc: Shawn Guo Cc: Sascha Hauer Cc: Pengutronix Kernel Team Cc: Fabio Estevam Cc: NXP Linux Team Cc: linux-arm-kernel@lists.infradead.org Acked-by: Will Deacon Link: https://lore.kernel.org/r/20220405151517.29753-10-bp@alien8.de Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- drivers/perf/fsl_imx8_ddr_perf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c index 726ed8f59868..912a220a9db9 100644 --- a/drivers/perf/fsl_imx8_ddr_perf.c +++ b/drivers/perf/fsl_imx8_ddr_perf.c @@ -29,7 +29,7 @@ #define CNTL_OVER_MASK 0xFFFFFFFE #define CNTL_CSV_SHIFT 24 -#define CNTL_CSV_MASK (0xFF << CNTL_CSV_SHIFT) +#define CNTL_CSV_MASK (0xFFU << CNTL_CSV_SHIFT) #define EVENT_CYCLES_ID 0 #define EVENT_CYCLES_COUNTER 0 -- 2.35.1