linux/include/asm-powerpc/pgalloc-64.h, branch v2.6.23.4

[POWERPC] Fix return from pte_alloc_one() in out-of-memory case

2007-06-02T11:01:56Z

pte_alloc_one() is expected to return NULL if out of memory. But it returns virt_to_page(NULL), which is not NULL. This fixes it. Cc: Paul Mackerras Signed-off-by: Akinobu Mita Signed-off-by: Paul Mackerras

[POWERPC] Don't use SLAB/SLUB for PTE pages

2007-05-09T06:35:00Z

The SLUB allocator relies on struct page fields first_page and slab, overwritten by ptl when SPLIT_PTLOCK: so the SLUB allocator cannot then be used for the lowest level of pagetable pages. This was obstructing SLUB on PowerPC, which uses kmem_caches for its pagetables. So convert its pte level to use normal gfp pages (whereas pmd, pud and 64k-page pgd want partpages, so continue to use kmem_caches for pmd, pud and pgd). Signed-off-by: Hugh Dickins Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras

[POWERPC] Remove arch/powerpc's dependence on asm-ppc/pg{alloc,table}.h

2007-05-02T10:04:30Z

Currently, all 32-bit powerpc platforms use asm-ppc/pgtable.h and asm-ppc/pgalloc.h, even when otherwise compiled with ARCH=powerpc. Those asm-ppc files are a fairly nasty tangle of #ifdefs including a bunch of things which shouldn't be necessary any more in arch/powerpc. Cleaning up that mess is going to take a while, but this patch is a first step. It separates the asm-powerpc/pg{alloc,table}.h into 64 bit and 32 bit versions in asm-powerpc, which the basic .h files in asm-powerpc select based on config. We make a few tiny tweaks to the innards of the files along the way, making the outermost ifdefs (double-inclusion protection and __KERNEL__) a little cleaner, and #including asm-generic/pgtable.h from the top-level asm-powerpc/pgtable.h (since both the old 32-bit and 64-bit versions ended with such an #include). Signed-off-by: David Gibson Signed-off-by: Paul Mackerras