linux-kernel - Re: [PATCH 4/5] Fix the configuration dependencies

Open Source and information security mailing list archives

Date:	Fri, 16 Nov 2007 08:25:21 -0800
From:	Simon Horman <horms@...ge.net.au>
To:	Ken'ichi Ohmichi <oomichi@....nes.nec.co.jp>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	kexec-ml <kexec@...ts.infradead.org>
Subject: Re: [PATCH 4/5] Fix the configuration dependencies

On Fri, Nov 16, 2007 at 11:33:20AM +0900, Ken'ichi Ohmichi wrote:
> 
> This patch fixes the configuration dependencies in the vmcoreinfo data.
> 
> i386's "node_data" is defined in arch/x86/mm/discontig_32.c,
> and x86_64's one is defined in arch/x86/mm/numa_64.c.
> They depend on CONFIG_NUMA:
>   arch/x86/mm/Makefile_32:7
>     obj-$(CONFIG_NUMA) += discontig_32.o
>   arch/x86/mm/Makefile_64:7
>     obj-$(CONFIG_NUMA) += numa_64.o
> 
> ia64's "pgdat_list" is defined in arch/ia64/mm/discontig.c,
> and it depends on CONFIG_DISCONTIGMEM and CONFIG_SPARSEMEM:
>   arch/ia64/mm/Makefile:9-10
>     obj-$(CONFIG_DISCONTIGMEM) += discontig.o
>     obj-$(CONFIG_SPARSEMEM)    += discontig.o
> 
> ia64's "node_memblk" is defined in arch/ia64/mm/numa.c,
> and it depends on CONFIG_NUMA:
>   arch/ia64/mm/Makefile:8
>     obj-$(CONFIG_NUMA)         += numa.o
> 
> Signed-off-by: Ken'ichi Ohmichi <oomichi@....nes.nec.co.jp>

This appears correct to me, checking through the symbols and the
location of their deffinitions, though I have not had a chance to run
many build checks.

I also note that CONFIG_ARCH_DISCONTIGMEM_ENABLE does not even
appear to exist on i386, so it looks that without this change
the code in question whould never be enabled.

Acked-by: Simon Horman <horms@...ge.net.au>

> ---
> diff -rpuN a/arch/ia64/kernel/machine_kexec.c b/arch/ia64/kernel/machine_kexec.c
> --- a/arch/ia64/kernel/machine_kexec.c	2007-11-14 15:39:06.000000000 +0900
> +++ b/arch/ia64/kernel/machine_kexec.c	2007-11-14 15:41:41.000000000 +0900
> @@ -129,10 +129,11 @@ void machine_kexec(struct kimage *image)
>  
>  void arch_crash_save_vmcoreinfo(void)
>  {
> -#if defined(CONFIG_ARCH_DISCONTIGMEM_ENABLE) && defined(CONFIG_NUMA)
> +#if defined(CONFIG_DISCONTIGMEM) || defined(CONFIG_SPARSEMEM)
>  	VMCOREINFO_SYMBOL(pgdat_list);
>  	VMCOREINFO_LENGTH(pgdat_list, MAX_NUMNODES);
> -
> +#endif
> +#ifdef CONFIG_NUMA
>  	VMCOREINFO_SYMBOL(node_memblk);
>  	VMCOREINFO_LENGTH(node_memblk, NR_NODE_MEMBLKS);
>  	VMCOREINFO_STRUCT_SIZE(node_memblk_s);
> diff -rpuN a/arch/x86/kernel/machine_kexec_32.c b/arch/x86/kernel/machine_kexec_32.c
> --- a/arch/x86/kernel/machine_kexec_32.c	2007-11-14 15:39:19.000000000 +0900
> +++ b/arch/x86/kernel/machine_kexec_32.c	2007-11-14 15:39:33.000000000 +0900
> @@ -151,7 +151,7 @@ NORET_TYPE void machine_kexec(struct kim
>  
>  void arch_crash_save_vmcoreinfo(void)
>  {
> -#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
> +#ifdef CONFIG_NUMA
>  	VMCOREINFO_SYMBOL(node_data);
>  	VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
>  #endif
> diff -rpuN a/arch/x86/kernel/machine_kexec_64.c b/arch/x86/kernel/machine_kexec_64.c
> --- a/arch/x86/kernel/machine_kexec_64.c	2007-11-14 15:39:19.000000000 +0900
> +++ b/arch/x86/kernel/machine_kexec_64.c	2007-11-14 15:39:33.000000000 +0900
> @@ -235,7 +235,7 @@ void arch_crash_save_vmcoreinfo(void)
>  {
>  	VMCOREINFO_SYMBOL(init_level4_pgt);
>  
> -#ifdef CONFIG_ARCH_DISCONTIGMEM_ENABLE
> +#ifdef CONFIG_NUMA
>  	VMCOREINFO_SYMBOL(node_data);
>  	VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
>  #endif
> _
> 
> 
> 

> _______________________________________________
> kexec mailing list
> kexec@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec

-- 
宝曼 西門 (ホウマン・サイモン) | Simon Horman (Horms)
-
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/

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives