From 50eae2a7c9862afe263a2003c12f457ecfc9e6a2 Mon Sep 17 00:00:00 2001 From: "Huang, Ying" Date: Fri, 28 Mar 2008 10:49:42 +0800 Subject: x86, boot: add free_early to early reservation machanism Add free_early to early reservation mechanism - this way early bootup failure paths can stop wasting memory. Signed-off-by: Huang Ying Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- arch/x86/kernel/e820_64.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'arch') diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c index cbd42e51cb08..79f0d52fa99a 100644 --- a/arch/x86/kernel/e820_64.c +++ b/arch/x86/kernel/e820_64.c @@ -84,6 +84,28 @@ void __init reserve_early(unsigned long start, unsigned long end, char *name) strncpy(r->name, name, sizeof(r->name) - 1); } +void __init free_early(unsigned long start, unsigned long end) +{ + struct early_res *r; + int i, j; + + for (i = 0; i < MAX_EARLY_RES && early_res[i].end; i++) { + r = &early_res[i]; + if (start == r->start && end == r->end) + break; + } + if (i >= MAX_EARLY_RES || !early_res[i].end) + panic("free_early on not reserved area: %lx-%lx!", start, end); + + for (j = i + 1; j < MAX_EARLY_RES && early_res[j].end; j++) + ; + + memcpy(&early_res[i], &early_res[i + 1], + (j - 1 - i) * sizeof(struct early_res)); + + early_res[j - 1].end = 0; +} + void __init early_res_to_bootmem(void) { int i; -- cgit v1.2.2