From ff741906ad3cf4b8ca1a958acb013a97a6381ca2 Mon Sep 17 00:00:00 2001 From: Ashok Raj Date: Fri, 11 Nov 2005 14:32:40 -0800 Subject: [IA64] support for cpu0 removal here is the BSP removal support for IA64. Its pretty much the same thing that was released a while back, but has your feedback incorporated. - Removed CONFIG_BSP_REMOVE_WORKAROUND and associated cmdline param - Fixed compile issue with sn2/zx1 due to a undefined fix_b0_for_bsp - some formatting nits (whitespace etc) This has been tested on tiger and long back by alex on hp systems as well. Signed-off-by: Ashok Raj Signed-off-by: Tony Luck --- arch/ia64/mm/contig.c | 4 +++- arch/ia64/mm/discontig.c | 9 +++++++-- 2 files changed, 10 insertions(+), 3 deletions(-) (limited to 'arch/ia64/mm') diff --git a/arch/ia64/mm/contig.c b/arch/ia64/mm/contig.c index acaaec4e468..9855ba31809 100644 --- a/arch/ia64/mm/contig.c +++ b/arch/ia64/mm/contig.c @@ -181,13 +181,15 @@ per_cpu_init (void) { void *cpu_data; int cpu; + static int first_time=1; /* * get_free_pages() cannot be used before cpu_init() done. BSP * allocates "NR_CPUS" pages for all CPUs to avoid that AP calls * get_zeroed_page(). */ - if (smp_processor_id() == 0) { + if (first_time) { + first_time=0; cpu_data = __alloc_bootmem(PERCPU_PAGE_SIZE * NR_CPUS, PERCPU_PAGE_SIZE, __pa(MAX_DMA_ADDRESS)); for (cpu = 0; cpu < NR_CPUS; cpu++) { diff --git a/arch/ia64/mm/discontig.c b/arch/ia64/mm/discontig.c index c87d6d1d581..573d5cc63e2 100644 --- a/arch/ia64/mm/discontig.c +++ b/arch/ia64/mm/discontig.c @@ -528,12 +528,17 @@ void __init find_memory(void) void *per_cpu_init(void) { int cpu; + static int first_time = 1; + if (smp_processor_id() != 0) return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; - for (cpu = 0; cpu < NR_CPUS; cpu++) - per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; + if (first_time) { + first_time = 0; + for (cpu = 0; cpu < NR_CPUS; cpu++) + per_cpu(local_per_cpu_offset, cpu) = __per_cpu_offset[cpu]; + } return __per_cpu_start + __per_cpu_offset[smp_processor_id()]; } -- cgit v1.2.3