linux-kernel - Re: [PATCHv4 2/2] arm: Get rid of meminfo

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Message-ID: <alpine.LFD.2.11.1402181755031.17677@knanqh.ubzr>
Date:	Tue, 18 Feb 2014 18:47:50 -0500 (EST)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Laura Abbott <lauraa@...eaurora.org>
cc:	Russell King <linux@....linux.org.uk>,
	David Brown <davidb@...eaurora.org>,
	Daniel Walker <dwalker@...o99.com>,
	Jason Cooper <jason@...edaemon.net>,
	Andrew Lunn <andrew@...n.ch>,
	Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>,
	Eric Miao <eric.y.miao@...il.com>,
	Haojian Zhuang <haojian.zhuang@...il.com>,
	Ben Dooks <ben-linux@...ff.org>,
	Kukjin Kim <kgene.kim@...sung.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	Leif Lindholm <leif.lindholm@...aro.org>,
	Grygorii Strashko <grygorii.strashko@...com>,
	Catalin Marinas <catalin.marinas@....com>,
	Rob Herring <robherring2@...il.com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	Will Deacon <will.deacon@....com>,
	Santosh Shilimkar <santosh.shilimkar@...com>,
	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	Courtney Cavin <courtney.cavin@...ymobile.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Grant Likely <grant.likely@...retlab.ca>
Subject: Re: [PATCHv4 2/2] arm: Get rid of meminfo

On Tue, 18 Feb 2014, Laura Abbott wrote:

> memblock is now fully integrated into the kernel and is the prefered
> method for tracking memory. Rather than reinvent the wheel with
> meminfo, migrate to using memblock directly instead of meminfo as
> an intermediate.
> 
> Acked-by: Jason Cooper <jason@...edaemon.net>
> Acked-by: Catalin Marinas <catalin.marinas@....com>
> Acked-by: Santosh Shilimkar <santosh.shilimkar@...com>
> Acked-by: Kukjin Kim <kgene.kim@...sung.com>
> Tested-by: Marek Szyprowski <m.szyprowski@...sung.com>
> Tested-by: Leif Lindholm <leif.lindholm@...aro.org>
> Signed-off-by: Laura Abbott <lauraa@...eaurora.org>

Reviewed-by: Nicolas Pitre <nico@...aro.org>

A small comments below.

> diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
> index 8d6a089..0196091 100644
> --- a/arch/arm/include/asm/setup.h
> +++ b/arch/arm/include/asm/setup.h
> @@ -26,29 +26,6 @@ static const struct tagtable __tagtable_##fn __tag = { tag, fn }
>   */
>  #define NR_BANKS	CONFIG_ARM_NR_BANKS

This may go as well now.  Please consider this patch as well for your 
series:

Subject: [PATCH] arm: Get rid of NR_BANKS

This constant is no longer used, except in the atag_to_fdt compatibility
layer where a local definition is now provided.  This could be removed
entirely i.e. having no limits but this is probably not worth it.

Signed-off-by: Nicolas Pitre <nico@...aro.org>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index e254198177..1ca42ed304 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1090,11 +1090,6 @@ source "arch/arm/firmware/Kconfig"
 
 source arch/arm/mm/Kconfig
 
-config ARM_NR_BANKS
-	int
-	default 16 if ARCH_EP93XX
-	default 8
-
 config IWMMXT
 	bool "Enable iWMMXt support" if !CPU_PJ4
 	depends on CPU_XSCALE || CPU_XSC3 || CPU_MOHAWK || CPU_PJ4
diff --git a/arch/arm/boot/compressed/atags_to_fdt.c b/arch/arm/boot/compressed/atags_to_fdt.c
index d1153c8a76..9448aa0c66 100644
--- a/arch/arm/boot/compressed/atags_to_fdt.c
+++ b/arch/arm/boot/compressed/atags_to_fdt.c
@@ -7,6 +7,8 @@
 #define do_extend_cmdline 0
 #endif
 
+#define NR_BANKS 16
+
 static int node_offset(void *fdt, const char *node_path)
 {
 	int offset = fdt_path_offset(fdt, node_path);
diff --git a/arch/arm/include/asm/setup.h b/arch/arm/include/asm/setup.h
index 01960916dd..e0adb9f1bf 100644
--- a/arch/arm/include/asm/setup.h
+++ b/arch/arm/include/asm/setup.h
@@ -21,11 +21,6 @@
 #define __tagtable(tag, fn) \
 static const struct tagtable __tagtable_##fn __tag = { tag, fn }
 
-/*
- * Memory map description
- */
-#define NR_BANKS	CONFIG_ARM_NR_BANKS
-
 extern int arm_add_memory(u64 start, u64 size);
 extern void early_print(const char *str, ...);
 extern void dump_machine_table(void);

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