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Message-ID: <20140620082520.GC25104@arm.com> Date: Fri, 20 Jun 2014 09:25:20 +0100 From: Will Deacon <will.deacon@....com> To: Colin Cross <ccross@...roid.com> Cc: "linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>, Catalin Marinas <Catalin.Marinas@....com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org>, "stable@...r.kernel.org" <stable@...r.kernel.org> Subject: Re: [PATCH] ARM64: implement TASK_SIZE_OF Hi Colin, On Wed, Jun 18, 2014 at 09:10:09PM +0100, Colin Cross wrote: > 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. Looks sane to me. Acked-by: Will Deacon <will.deacon@....com> I take it you're being bitten by this in real software, hence the CC stable tag? Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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