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parisc: kill WARN in free_initmem when DEBUG_KERNEL 

Doing an IPI with local interrupts off triggers a warning. We
don't need to be quite so ridiculously paranoid. Also, clean up
a bit of the code a little.

Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
hifive-unleashed-5.1
Kyle McMartin 2009-04-05 02:53:47 +00:00
parent 692c14a593
commit 4fb11781a0
1 changed files with 9 additions and 20 deletions
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29
arch/parisc/mm/init.c
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@ -370,34 +370,22 @@ static void __init setup_bootmem(void)
void free_initmem(void)
{
unsigned long addr, init_begin, init_end;
printk(KERN_INFO "Freeing unused kernel memory: ");
unsigned long addr;
unsigned long init_begin = (unsigned long)__init_begin;
unsigned long init_end = (unsigned long)__init_end;
#ifdef CONFIG_DEBUG_KERNEL
/* Attempt to catch anyone trying to execute code here
* by filling the page with BRK insns.
*
* If we disable interrupts for all CPUs, then IPI stops working.
* Kinda breaks the global cache flushing.
*/
local_irq_disable();
memset(__init_begin, 0x00,
(unsigned long)__init_end - (unsigned long)__init_begin);
flush_data_cache();
asm volatile("sync" : : );
flush_icache_range((unsigned long)__init_begin, (unsigned long)__init_end);
asm volatile("sync" : : );
local_irq_enable();
memset(init_begin, 0x00, init_end - init_begin);
flush_icache_range(init_begin, init_end);
#endif
/* align __init_begin and __init_end to page size,
ignoring linker script where we might have tried to save RAM */
init_begin = PAGE_ALIGN((unsigned long)(__init_begin));
init_end = PAGE_ALIGN((unsigned long)(__init_end));
init_begin = PAGE_ALIGN(init_begin);
init_end = PAGE_ALIGN(init_end);
for (addr = init_begin; addr < init_end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
@ -409,7 +397,8 @@ void free_initmem(void)
/* set up a new led state on systems shipped LED State panel */
pdc_chassis_send_status(PDC_CHASSIS_DIRECT_BCOMPLETE);
printk("%luk freed\n", (init_end - init_begin) >> 10);
printk(KERN_INFO "Freeing unused kernel memory: %luk freed\n",
(init_end - init_begin) >> 10);
}