Re: [PATCH] Replace "vmalloc_node" with "vmalloc" for no-mmu architectures in oprofile driver

[Andrew Morton <akpm@osdl.org>]

"Luke Yang" <luke.adi@gmail.com> wrote:
>
>   This is a fix to the oprofile driver. It calls "vmalloc_node()" but
>  no-mmu CPUs do not have that function. "vmalloc()" is OK for no-mmu
>  CPUs.
> 
>  Signed-off-by: Luke Yang <luke.adi@gmail.com>
> 
>  Index: linux-2.6/drivers/oprofile/cpu_buffer.c
>  ===================================================================
>  --- linux-2.6/drivers/oprofile/cpu_buffer.c     2006-02-16
>  16:16:35.000000000 +0800
>  +++ linux-2.6/drivers/oprofile/cpu_buffer.c     2006-02-16
>  16:20:58.000000000 +0800
>  @@ -51,9 +51,13 @@
> 
>          for_each_online_cpu(i) {
>                  struct oprofile_cpu_buffer * b = &cpu_buffer[i];
>  -
>  +
>  +#ifdef MMU
>                  b->buffer = vmalloc_node(sizeof(struct op_sample) * buffer_size,
>                          cpu_to_node(i));
>  +#else
>  +               b->buffer = vmalloc(sizeof(struct op_sample) * buffer_size);
>  +#endif
>                  if (!b->buffer)
>                          goto fail;

You wanted CONFIG_MMU there.

A better fix is to provide vmalloc_node() on nommu architectures.  COuld you
compile-test this please?

--- devel/mm/nommu.c~nommu-implement-vmalloc_node	2006-02-27 19:30:47.000000000 -0800
+++ devel-akpm/mm/nommu.c	2006-02-27 19:31:53.000000000 -0800
@@ -53,7 +53,6 @@ DECLARE_RWSEM(nommu_vma_sem);
 struct vm_operations_struct generic_file_vm_ops = {
 };
 
-EXPORT_SYMBOL(vmalloc);
 EXPORT_SYMBOL(vfree);
 EXPORT_SYMBOL(vmalloc_to_page);
 EXPORT_SYMBOL(vmalloc_32);
@@ -205,6 +204,13 @@ void *vmalloc(unsigned long size)
 {
        return __vmalloc(size, GFP_KERNEL | __GFP_HIGHMEM, PAGE_KERNEL);
 }
+EXPORT_SYMBOL(vmalloc);
+
+void *vmalloc_node(unsigned long size, int node)
+{
+	return vmalloc(size);
+}
+EXPORT_SYMBOL(vmalloc_node);
 
 /*
  *	vmalloc_32  -  allocate virtually continguos memory (32bit addressable)
_