[POWERPC] Size swapper_pg_dir correctly
David Gibson pointed out that swapper_pg_dir actually need to be PGD_TABLE_SIZE bytes long not PAGE_SIZE. This actually saves 64k in the bss for a kernel ppc64_defconfig built with CONFIG_PPC_64K_PAGES. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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@ -320,5 +320,9 @@ int main(void)
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DEFINE(VMALLOC_START_ESID, GET_ESID(VMALLOC_START));
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DEFINE(VMALLOC_START_VSID, KERNEL_VSID(VMALLOC_START));
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#endif
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#ifdef CONFIG_PPC64
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DEFINE(PGD_TABLE_SIZE, PGD_TABLE_SIZE);
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#endif
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return 0;
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}
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@ -1539,4 +1539,4 @@ empty_zero_page:
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.globl swapper_pg_dir
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swapper_pg_dir:
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.space PAGE_SIZE
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.space PGD_TABLE_SIZE
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@ -10,10 +10,12 @@
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#define PUD_INDEX_SIZE 7
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#define PGD_INDEX_SIZE 9
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#ifndef __ASSEMBLY__
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#define PTE_TABLE_SIZE (sizeof(pte_t) << PTE_INDEX_SIZE)
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#define PMD_TABLE_SIZE (sizeof(pmd_t) << PMD_INDEX_SIZE)
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#define PUD_TABLE_SIZE (sizeof(pud_t) << PUD_INDEX_SIZE)
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#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE)
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#endif /* __ASSEMBLY__ */
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#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
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#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
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@ -9,9 +9,11 @@
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#define PUD_INDEX_SIZE 0
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#define PGD_INDEX_SIZE 4
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#ifndef __ASSEMBLY__
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#define PTE_TABLE_SIZE (sizeof(real_pte_t) << PTE_INDEX_SIZE)
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#define PMD_TABLE_SIZE (sizeof(pmd_t) << PMD_INDEX_SIZE)
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#define PGD_TABLE_SIZE (sizeof(pgd_t) << PGD_INDEX_SIZE)
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#endif /* __ASSEMBLY__ */
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#define PTRS_PER_PTE (1 << PTE_INDEX_SIZE)
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#define PTRS_PER_PMD (1 << PMD_INDEX_SIZE)
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