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arm64: Fix building error with 16KB pages and 36-bit VA 

In such configuration, Linux uses only two pages of page tables and
__pud_populate() should not be used. However, the BUILD_BUG() triggers
since pud_sect() is still defined and the compiler cannot eliminate such
code, even though at run-time it should not be triggered. This patch
extends the #ifdef ARM64_64K_PAGES condition for pud_sect to include
PGTABLE_LEVELS < 3.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas 2016-02-25 15:53:44 +00:00
parent 28c5dcb22f
commit cac4b8cdf5
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/pgtable.h
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@ -395,7 +395,7 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn,
#define pmd_sect(pmd) ((pmd_val(pmd) & PMD_TYPE_MASK) == \
PMD_TYPE_SECT)
#ifdef CONFIG_ARM64_64K_PAGES
#if defined(CONFIG_ARM64_64K_PAGES) || CONFIG_PGTABLE_LEVELS < 3
#define pud_sect(pud) (0)
#define pud_table(pud) (1)
#else