On Thu, 30 Aug 2007, Adrian Bunk wrote:
> > CC init/version.o
> > LD init/built-in.o
> > LD .tmp_vmlinux1
> > arch/alpha/kernel/built-in.o(.text+0xaaa8): In function `pdev_save_srm_config':
> > include/linux/slub_def.h:154: undefined reference to `__kmalloc_size_too_large'
> > arch/alpha/kernel/built-in.o(.text+0xaaac):include/linux/slub_def.h:154: undefined reference to `__kmalloc_size_too_large'
> > arch/alpha/kernel/built-in.o(.text+0xd0a8): In function `module_frob_arch_sections':
> > include/linux/slub_def.h:154: undefined reference to `__kmalloc_size_too_large'
> > arch/alpha/kernel/built-in.o(.text+0xd0ac):include/linux/slub_def.h:154: undefined reference to `__kmalloc_size_too_large'
> > arch/alpha/kernel/built-in.o(.text+0x19388): In function `srmcons_get_private_struct':
> > include/linux/slub_def.h:154: undefined reference to `__kmalloc_size_too_large'
> > arch/alpha/kernel/built-in.o(.text+0x1938c):include/linux/slub_def.h:154: more undefined references to `__kmalloc_size_too_large' follow
> > make[1]: *** [.tmp_vmlinux1] Error 1
> > make: *** [_all] Error 2
> >...
>
> Christoph, is your fix in -mm suitable for 2.6.23, or how else should
> this regression be fixed for 2.6.23?
Could you give me an asm dump via objdump of one of these functions?
I wonder what is going on there? Seeing the code generated may give us a
hint what is going on.
Likely an old compiler that has troubles performing constant folding <sigh>. One
solution would be to use a newer compiler?
And yes, the page allocator pass through patch in mm would fix this.
Or define CONFIG_BROKEN_CONSTANT_FOLDING for alpha and then use this
patch:
---
include/linux/slub_def.h | 4 ++++
1 file changed, 4 insertions(+)
Index: linux-2.6/include/linux/slub_def.h
===================================================================
--- linux-2.6.orig/include/linux/slub_def.h 2007-08-29 17:03:48.000000000 -0700
+++ linux-2.6/include/linux/slub_def.h 2007-08-29 17:09:55.000000000 -0700
@@ -168,6 +168,7 @@ void *__kmalloc(size_t size, gfp_t flags
static inline void *kmalloc(size_t size, gfp_t flags)
{
+#ifndef CONFIG_BROKEN_CONSTANT_FOLDING
if (__builtin_constant_p(size) && !(flags & SLUB_DMA)) {
struct kmem_cache *s = kmalloc_slab(size);
@@ -176,6 +177,7 @@ static inline void *kmalloc(size_t size,
return kmem_cache_alloc(s, flags);
} else
+#endif
return __kmalloc(size, flags);
}
@@ -185,6 +187,7 @@ void *kmem_cache_alloc_node(struct kmem_
static inline void *kmalloc_node(size_t size, gfp_t flags, int node)
{
+#ifndef CONFIG_BROKEN_CONSTANT_FOLDING
if (__builtin_constant_p(size) && !(flags & SLUB_DMA)) {
struct kmem_cache *s = kmalloc_slab(size);
@@ -193,6 +196,7 @@ static inline void *kmalloc_node(size_t
return kmem_cache_alloc_node(s, flags, node);
} else
+#endif
return __kmalloc_node(size, flags, node);
}
#endif
-
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