Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030465AbaGRNSD (ORCPT ); Fri, 18 Jul 2014 09:18:03 -0400 Received: from bband-dyn38.178-41-141.t-com.sk ([178.41.141.38]:17935 "EHLO ip4-83-240-18-248.cust.nbox.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965878AbaGRNR6 (ORCPT ); Fri, 18 Jul 2014 09:17:58 -0400 From: Jiri Slaby To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Colin Cross , Catalin Marinas , Jiri Slaby Subject: [PATCH 3.12 150/170] arm64: implement TASK_SIZE_OF Date: Fri, 18 Jul 2014 14:12:35 +0200 Message-Id: X-Mailer: git-send-email 2.0.0 In-Reply-To: <48e8cad86bb1241c08bdaa80db022c25068ff8e0.1405685481.git.jslaby@suse.cz> References: <48e8cad86bb1241c08bdaa80db022c25068ff8e0.1405685481.git.jslaby@suse.cz> In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Colin Cross 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit fa2ec3ea10bd377f9d55772b1dab65178425a1a2 upstream. include/linux/sched.h implements TASK_SIZE_OF as TASK_SIZE if it is not set by the architecture headers. TASK_SIZE uses the current task to determine the size of the virtual address space. On a 64-bit kernel this will cause reading /proc/pid/pagemap of a 64-bit process from a 32-bit process to return EOF when it reads past 0xffffffff. Implement TASK_SIZE_OF exactly the same as TASK_SIZE with test_tsk_thread_flag instead of test_thread_flag. Signed-off-by: Colin Cross Acked-by: Will Deacon Signed-off-by: Catalin Marinas Signed-off-by: Jiri Slaby --- arch/arm64/include/asm/memory.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h index 20925bcf4e2a..e1134d04e07e 100644 --- a/arch/arm64/include/asm/memory.h +++ b/arch/arm64/include/asm/memory.h @@ -51,6 +51,8 @@ #define TASK_SIZE_32 UL(0x100000000) #define TASK_SIZE (test_thread_flag(TIF_32BIT) ? \ TASK_SIZE_32 : TASK_SIZE_64) +#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \ + TASK_SIZE_32 : TASK_SIZE_64) #else #define TASK_SIZE TASK_SIZE_64 #endif /* CONFIG_COMPAT */ -- 2.0.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/