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Message-ID: <20070907064908.GG31880@one.firstfloor.org> Date: Fri, 7 Sep 2007 08:49:08 +0200 From: Andi Kleen <andi@...stfloor.org> To: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca> Cc: akpm@...ux-foundation.org, linux-kernel@...r.kernel.org, Adrian Bunk <bunk@...sta.de>, Andi Kleen <andi@...stfloor.org>, Alexey Dobriyan <adobriyan@...il.com>, Christoph Hellwig <hch@...radead.org> Subject: Re: [patch 3/8] Immediate Values - Kconfig menu in EMBEDDED > +config IMMEDIATE > + default y if !DISABLE_IMMEDIATE It's still unclear to me why DISABLE_IMMEDIATE is needed. It would be better to make it just the default. > +config DISABLE_IMMEDIATE > + default y if EMBEDDED > + bool "Disable immediate values" if EMBEDDED > + depends on X86_32 || PPC || PPC64 > + help > + Disable code patching based immediate values for embedded systems. It > + consumes slightly more memory and requires to modify the instruction > + stream each time a variable is updated. > Should really be disabled for > + embedded systems with read-only text. There are no such on x86 at least And for other architectures like PPC it would be better to have a high level CONFIG_READ_ONLY_TEXT then that does the necessary changes internally. But I'm not sure it's even supporting r/o text. -Andi - 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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