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[PATCH] machine_kexec.c: Fix the description of segment handling 

One of my original comments in machine_kexec was unclear
and this should fix it.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Andi Kleen <ak@muc.de>
Acked-by: Horms <horms@verge.net.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Eric W. Biederman 2006-07-30 03:03:20 -07:00 committed by Linus Torvalds
parent c35a7261ea
commit 2a8a3d5b65
2 changed files with 10 additions and 16 deletions
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13
arch/i386/kernel/machine_kexec.c
View File

@ -189,14 +189,11 @@ NORET_TYPE void machine_kexec(struct kimage *image)
memcpy((void *)reboot_code_buffer, relocate_new_kernel,
relocate_new_kernel_size);
/* The segment registers are funny things, they are
* automatically loaded from a table, in memory wherever you
* set them to a specific selector, but this table is never
* accessed again you set the segment to a different selector.
*
* The more common model is are caches where the behide
* the scenes work is done, but is also dropped at arbitrary
* times.
/* The segment registers are funny things, they have both a
* visible and an invisible part. Whenever the visible part is
* set to a specific selector, the invisible part is loaded
* with from a table in memory. At no other time is the
* descriptor table in memory accessed.
*
* I take advantage of this here by force loading the
* segments, before I zap the gdt with an invalid value.

13
arch/x86_64/kernel/machine_kexec.c
View File

@ -207,14 +207,11 @@ NORET_TYPE void machine_kexec(struct kimage *image)
__flush_tlb();
/* The segment registers are funny things, they are
* automatically loaded from a table, in memory wherever you
* set them to a specific selector, but this table is never
* accessed again unless you set the segment to a different selector.
*
* The more common model are caches where the behide
* the scenes work is done, but is also dropped at arbitrary
* times.
/* The segment registers are funny things, they have both a
* visible and an invisible part. Whenever the visible part is
* set to a specific selector, the invisible part is loaded
* with from a table in memory. At no other time is the
* descriptor table in memory accessed.
*
* I take advantage of this here by force loading the
* segments, before I zap the gdt with an invalid value.