On Sat, Mar 27, 2010 at 05:50:06PM -0700, Yinghai Lu wrote:
> > diff --git a/arch/x86/mm/init.c b/arch/x86/mm/init.c
> > index e71c5cb..018e793 100644
> > --- a/arch/x86/mm/init.c
> > +++ b/arch/x86/mm/init.c
> > @@ -336,6 +336,11 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
> > if (addr >= end)
> > return;
> >
> > + if (WARN_ON(addr & ~PAGE_MASK || end & ~PAGE_MASK)) {
> > + addr = PAGE_ALIGN(addr);
> > + end &= PAGE_MASK;
> > + }
> > +
> > /*
> > * If debugging page accesses then do not free this memory but
> > * mark them not present - any buggy init-section access will
> > @@ -355,11 +360,10 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
> >
> > printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
> >
> > - for (; addr < end; addr += PAGE_SIZE) {
> > + for (; addr != end; addr += PAGE_SIZE) {
> > ClearPageReserved(virt_to_page(addr));
> > init_page_count(virt_to_page(addr));
> > - memset((void *)(addr & ~(PAGE_SIZE-1)),
> > - POISON_FREE_INITMEM, PAGE_SIZE);
> > + memset((void *)addr, POISON_FREE_INITMEM, PAGE_SIZE);
> > free_page(addr);
> > totalram_pages++;
> > }
> something wrong here, if someone pass (0x10, 0x20), the will be aligned to [0x1000, 0]
> you will get dead loop
You are right! It should be enough to move the alignment fixup above the addr >= end
check and in that case? So we would get the warning and then simply return.
> will update that.
Thanks!
> YH
Hannes
--
To unsubscribe from this list: send the line "unsubscribe linux-arch" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
