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| author | zhichang.yuan | 2014-12-09 08:26:47 +0100 |
|---|---|---|
| committer | Catalin Marinas | 2015-01-28 13:07:28 +0100 |
| commit | 523d6e9fae9333a0e2a7baf4d11c8bcca544790e (patch) | |
| tree | 3c0d9fc243f9e00ce49985e078a8c641029f0833 /arch/arm64/include/asm/pgtable.h | |
| parent | arm64: Enable CPU_IDLE in defconfig (diff) | |
| download | kernel-qcow2-linux-523d6e9fae9333a0e2a7baf4d11c8bcca544790e.tar.gz kernel-qcow2-linux-523d6e9fae9333a0e2a7baf4d11c8bcca544790e.tar.xz kernel-qcow2-linux-523d6e9fae9333a0e2a7baf4d11c8bcca544790e.zip | |
arm64:mm: free the useless initial page table
For 64K page system, after mapping a PMD section, the corresponding initial
page table is not needed any more. That page can be freed.
Signed-off-by: Zhichang Yuan <zhichang.yuan@linaro.org>
[catalin.marinas@arm.com: added BUG_ON() to catch late memblock freeing]
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 59079248529d..67f6ede39474 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -342,9 +342,12 @@ extern pgprot_t phys_mem_access_prot(struct file *file, unsigned long pfn, #ifdef CONFIG_ARM64_64K_PAGES #define pud_sect(pud) (0) +#define pud_table(pud) (1) #else #define pud_sect(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \ PUD_TYPE_SECT) +#define pud_table(pud) ((pud_val(pud) & PUD_TYPE_MASK) == \ + PUD_TYPE_TABLE) #endif static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) |