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Message-ID: <AANLkTi=dFXu=tGRRJt0cKbm8r528Sk9mHoLZ-Lh+oQ6y@mail.gmail.com> Date: Tue, 16 Nov 2010 10:07:41 +0000 From: Catalin Marinas <catalin.marinas@....com> To: Russell King - ARM Linux <linux@....linux.org.uk> Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v2 05/20] ARM: LPAE: Introduce L_PTE_NOEXEC and L_PTE_NOWRITE On 15 November 2010 18:30, Russell King - ARM Linux <linux@....linux.org.uk> wrote: > On Fri, Nov 12, 2010 at 06:00:25PM +0000, Catalin Marinas wrote: >> --- a/arch/arm/include/asm/pgtable-2level.h >> +++ b/arch/arm/include/asm/pgtable-2level.h >> @@ -128,6 +128,8 @@ >> #define L_PTE_USER (1 << 8) >> #define L_PTE_EXEC (1 << 9) >> #define L_PTE_SHARED (1 << 10) /* shared(v6), coherent(xsc3) */ >> +#define L_PTE_NOEXEC (0) >> +#define L_PTE_NOWRITE (0) > > Let's not make this more complicated than it has to be. If we need the > inverse of WRITE and EXEC, then that's what we should change everyone to, > not invent a new system to work along side the old system. Yes, that's fine. For PMD, we may still need a dummy PMD_SECT_AP_WRITE for the 3-level definitions unless we change the __pmd() accessor or __pmd_populate(). -- Catalin -- 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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