On 03/10/2020 06:57 PM, Thomas Bogendoerfer wrote:

On Tue, Mar 10, 2020 at 06:39:11AM +0530, Anshuman Khandual wrote:

quoted

diff --git a/arch/mips/include/asm/pgtable.h b/arch/mips/include/asm/pgtable.h
index aef5378f909c..8e4e4be1ca00 100644
--- a/arch/mips/include/asm/pgtable.h
+++ b/arch/mips/include/asm/pgtable.h

@@ -269,6 +269,36 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
  */
 extern pgd_t swapper_pg_dir[];
 
+/*
+ * Platform specific pte_special() and pte_mkspecial() definitions
+ * are required only when ARCH_HAS_PTE_SPECIAL is enabled.
+ */
+#if !defined(CONFIG_32BIT) && !defined(CONFIG_CPU_HAS_RIXI)

this looks wrong.

current Kconfig statement is

select ARCH_HAS_PTE_SPECIAL if !(32BIT && CPU_HAS_RIXI)

so we can't use PTE_SPECIAL on 32bit _and_ CPUs with RIXI support.

I already had asked for clarification on this.

Why can't we use

#if defined(CONFIG_ARCH_HAS_PTE_SPECIAL)

here as the comment already suggests ?

Yes, that will be easier and will automatically adjust in case
ARCH_HAS_PTE_SPECIAL scope changes later. Will respin the patch.

Thomas.

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