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remove dead code in pgtable_cache_init 

The conversion from using a slab cache to quicklist left some residual
dead code.

I note that in the conversion it now always allocates a whole page for
the pgd, rather than the 32 bytes needed for a PAE pgd.  Was this
intended?

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Andi Kleen <ak@suse.de>
Cc: William Lee Irwin III <wli@holomorphy.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jeremy Fitzhardinge 2007-10-16 11:51:29 -07:00 committed by Jeremy Fitzhardinge
parent 8965c1c095
commit 4f81784774
1 changed files with 5 additions and 17 deletions
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22
arch/x86/mm/init_32.c
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@ -746,24 +746,12 @@ struct kmem_cache *pmd_cache;
void __init pgtable_cache_init(void) void __init pgtable_cache_init(void)
{ {
size_t pgd_size = PTRS_PER_PGD*sizeof(pgd_t); if (PTRS_PER_PMD > 1)
if (PTRS_PER_PMD > 1) {
pmd_cache = kmem_cache_create("pmd", pmd_cache = kmem_cache_create("pmd",
PTRS_PER_PMD*sizeof(pmd_t), PTRS_PER_PMD*sizeof(pmd_t),
PTRS_PER_PMD*sizeof(pmd_t), PTRS_PER_PMD*sizeof(pmd_t),
SLAB_PANIC, SLAB_PANIC,
pmd_ctor); pmd_ctor);
if (!SHARED_KERNEL_PMD) {
/* If we're in PAE mode and have a non-shared
kernel pmd, then the pgd size must be a
page size. This is because the pgd_list
links through the page structure, so there
can only be one pgd per page for this to
work. */
pgd_size = PAGE_SIZE;
}
}
} }
/* /*