diff options
| author | Huacai Chen <[email protected]> | 2018-11-15 15:53:54 +0800 |
|---|---|---|
| committer | Paul Burton <[email protected]> | 2018-11-20 21:05:39 -0800 |
| commit | 92aa0718c9fa5160ad2f0e7b5bffb52f1ea1e51a (patch) | |
| tree | 4ca74ae9d482174be55b55941d75983cff89211b | |
| parent | bb53fdf395eed103f85061bfff3b116cee123895 (diff) | |
MIPS: Ensure pmd_present() returns false after pmd_mknotpresent()
This patch is borrowed from ARM64 to ensure pmd_present() returns false
after pmd_mknotpresent(). This is needed for THP.
References: 5bb1cc0ff9a6 ("arm64: Ensure pmd_present() returns false after pmd_mknotpresent()")
Reviewed-by: James Hogan <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>
Signed-off-by: Paul Burton <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/21135/
Cc: Ralf Baechle <[email protected]>
Cc: James Hogan <[email protected]>
Cc: Steven J . Hill <[email protected]>
Cc: [email protected]
Cc: Fuxin Zhang <[email protected]>
Cc: Zhangjin Wu <[email protected]>
Cc: <[email protected]> # 3.8+
| -rw-r--r-- | arch/mips/include/asm/pgtable-64.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/mips/include/asm/pgtable-64.h b/arch/mips/include/asm/pgtable-64.h index 0036ea0c7173..93a9dce31f25 100644 --- a/arch/mips/include/asm/pgtable-64.h +++ b/arch/mips/include/asm/pgtable-64.h @@ -265,6 +265,11 @@ static inline int pmd_bad(pmd_t pmd) static inline int pmd_present(pmd_t pmd) { +#ifdef CONFIG_MIPS_HUGE_TLB_SUPPORT + if (unlikely(pmd_val(pmd) & _PAGE_HUGE)) + return pmd_val(pmd) & _PAGE_PRESENT; +#endif + return pmd_val(pmd) != (unsigned long) invalid_pte_table; } |