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authorDavid S. Miller <davem@davemloft.net>2014-09-28 08:30:57 +0400
committerDavid S. Miller <davem@davemloft.net>2014-10-06 03:53:40 +0400
commitd195b71bad4347d2df51072a537f922546a904f1 (patch)
tree362c818469223f5ff4eb7476b485f6b55afb4cce /arch/sparc/include/asm/pgtable_64.h
parentee6a9333fa58e11577c1b531b8e0f5ffc0fd6f50 (diff)
downloadlinux-d195b71bad4347d2df51072a537f922546a904f1.tar.xz
sparc64: Kill unnecessary tables and increase MAX_BANKS.
swapper_low_pmd_dir and swapper_pud_dir are actually completely useless and unnecessary. We just need swapper_pg_dir[]. Naturally the other page table chunks will be allocated on an as-needed basis. Since the kernel actually accesses these tables in the PAGE_OFFSET view, there is not even a TLB locality advantage of placing them in the kernel image. Use the hard coded vmlinux.ld.S slot for swapper_pg_dir which is naturally page aligned. Increase MAX_BANKS to 1024 in order to handle heavily fragmented virtual guests. Even with this MAX_BANKS increase, the kernel is 20K+ smaller. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Bob Picco <bob.picco@oracle.com>
Diffstat (limited to 'arch/sparc/include/asm/pgtable_64.h')
-rw-r--r--arch/sparc/include/asm/pgtable_64.h1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index c0939228e4b1..bfeb626085ac 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -927,7 +927,6 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr,
#endif
extern pgd_t swapper_pg_dir[PTRS_PER_PGD];
-extern pmd_t swapper_low_pmd_dir[PTRS_PER_PMD];
void paging_init(void);
unsigned long find_ecache_flush_span(unsigned long size);