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x86: change static allocation of trampoline area

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Impact: fix trampoline sizing bug, save space

While debugging a suspend-to-RAM related issue it occured to me that
if the trampoline code had grown past 4 KB, we would have been
allocating too little memory for it, since the 4 KB size of the
trampoline is hardcoded into arch/x86/kernel/e820.c .  Change that
by making the kernel compute the trampoline size and allocate as much
memory as necessary.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Rafael J. Wysocki
2008-12-08 00:50:22 +01:00
committed by Ingo Molnar
parent 218d11a8b0
commit 3e1e9002aa
5 changed files with 30 additions and 18 deletions
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3
arch/x86/kernel/head32.c
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@@ -12,9 +12,12 @@
#include <asm/sections.h>
#include <asm/e820.h>
#include <asm/bios_ebda.h>
#include <asm/trampoline.h>
void __init i386_start_kernel(void)
{
reserve_trampoline_memory();
reserve_early(__pa_symbol(&_text), __pa_symbol(&_end), "TEXT DATA BSS");
#ifdef CONFIG_BLK_DEV_INITRD