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powerpc/mm: Always use STRICT_MM_TYPECHECKS

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Testing done by Paul Mackerras has shown that with a modern compiler
there is no negative effect on code generation from enabling
STRICT_MM_TYPECHECKS.

So remove the option, and always use the strict type definitions.

Acked-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2016-04-29 23:25:25 +10:00
parent 8ffb4103f5
commit 670eea9241
2 changed files with 0 additions and 54 deletions
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8
arch/powerpc/Kconfig.debug
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@ -19,14 +19,6 @@ config PPC_WERROR
depends on !PPC_DISABLE_WERROR
default y
config STRICT_MM_TYPECHECKS
bool "Do extra type checking on mm types"
default n
help
This option turns on extra type checking for some mm related types.
If you don't know what this means, say N.
config PRINT_STACK_DEPTH
int "Stack depth to print" if DEBUG_KERNEL
default 64

46
arch/powerpc/include/asm/pgtable-types.h
View File

@ -1,9 +1,6 @@
#ifndef _ASM_POWERPC_PGTABLE_TYPES_H
#define _ASM_POWERPC_PGTABLE_TYPES_H
#ifdef CONFIG_STRICT_MM_TYPECHECKS
/* These are used to make use of C type-checking. */
/* PTE level */
typedef struct { pte_basic_t pte; } pte_t;
#define __pte(x) ((pte_t) { (x) })
@ -48,49 +45,6 @@ typedef struct { unsigned long pgprot; } pgprot_t;
#define pgprot_val(x) ((x).pgprot)
#define __pgprot(x) ((pgprot_t) { (x) })
#else
/*
* .. while these make it easier on the compiler
*/
typedef pte_basic_t pte_t;
#define __pte(x) (x)
static inline pte_basic_t pte_val(pte_t pte)
{
return pte;
}
#ifdef CONFIG_PPC64
typedef unsigned long pmd_t;
#define __pmd(x) (x)
static inline unsigned long pmd_val(pmd_t pmd)
{
return pmd;
}
#if defined(CONFIG_PPC_BOOK3S_64) || !defined(CONFIG_PPC_64K_PAGES)
typedef unsigned long pud_t;
#define __pud(x) (x)
static inline unsigned long pud_val(pud_t pud)
{
return pud;
}
#endif /* CONFIG_PPC_BOOK3S_64 || !CONFIG_PPC_64K_PAGES */
#endif /* CONFIG_PPC64 */
typedef unsigned long pgd_t;
#define __pgd(x) (x)
static inline unsigned long pgd_val(pgd_t pgd)
{
return pgd;
}
typedef unsigned long pgprot_t;
#define pgprot_val(x) (x)
#define __pgprot(x) (x)
#endif /* CONFIG_STRICT_MM_TYPECHECKS */
/*
* With hash config 64k pages additionally define a bigger "real PTE" type that
* gathers the "second half" part of the PTE for pseudo 64k pages