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powerpc/ptdump: don't entirely rebuild kernel when selecting CONFIG_PPC_DEBUG_WX

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Selecting CONFIG_PPC_DEBUG_WX only impacts ptdump and pgtable_32/64
init calls. Declaring related functions in asm/pgtable.h implies
rebuilding almost everything.

Move ptdump_check_wx() declaration in mm/mmu_decl.h

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/bf34fd9dca61eadf9a134a9f89ebbc162cfd5f86.1578986011.git.christophe.leroy@c-s.fr
This commit is contained in:
Christophe Leroy 2020-01-14 07:14:40 +00:00 committed by Michael Ellerman
parent ed0bc98f8c
commit 1e1c8b2cc3
3 changed files with 8 additions and 6 deletions
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6
arch/powerpc/include/asm/pgtable.h
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@ -94,12 +94,6 @@ void mark_initmem_nx(void);
static inline void mark_initmem_nx(void) { }
#endif
#ifdef CONFIG_PPC_DEBUG_WX
void ptdump_check_wx(void);
#else
static inline void ptdump_check_wx(void) { }
#endif
/*
* When used, PTE_FRAG_NR is defined in subarch pgtable.h
* so we are sure it is included when arriving here.

6
arch/powerpc/mm/mmu_decl.h
View file

@ -181,3 +181,9 @@ void mmu_mark_rodata_ro(void);
static inline void mmu_mark_initmem_nx(void) { }
static inline void mmu_mark_rodata_ro(void) { }
#endif
#ifdef CONFIG_PPC_DEBUG_WX
void ptdump_check_wx(void);
#else
static inline void ptdump_check_wx(void) { }
#endif

2
arch/powerpc/mm/ptdump/ptdump.c
View file

@ -24,6 +24,8 @@
#include <asm/page.h>
#include <asm/pgalloc.h>
#include <mm/mmu_decl.h>
#include "ptdump.h"
/*