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Subject[PATCH] powerpc/ptdump: don't entirely rebuild kernel when selecting CONFIG_PPC_DEBUG_WX
Date
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 a new dedicated header file.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
arch/powerpc/include/asm/pgtable.h | 6 ------
arch/powerpc/include/asm/ptdump.h | 15 +++++++++++++++
arch/powerpc/mm/pgtable_32.c | 1 +
arch/powerpc/mm/pgtable_64.c | 1 +
arch/powerpc/mm/ptdump/ptdump.c | 1 +
5 files changed, 18 insertions(+), 6 deletions(-)
create mode 100644 arch/powerpc/include/asm/ptdump.h

diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 0e4ec8cc37b7..8cc543ed114c 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -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.
diff --git a/arch/powerpc/include/asm/ptdump.h b/arch/powerpc/include/asm/ptdump.h
new file mode 100644
index 000000000000..246b92c21729
--- /dev/null
+++ b/arch/powerpc/include/asm/ptdump.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_PTDUMP_H
+#define _ASM_POWERPC_PTDUMP_H
+
+#ifndef __ASSEMBLY__
+
+#ifdef CONFIG_PPC_DEBUG_WX
+void ptdump_check_wx(void);
+#else
+static inline void ptdump_check_wx(void) { }
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _ASM_POWERPC_PTDUMP_H */
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 73b84166d06a..6c866f1b1eeb 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -29,6 +29,7 @@
#include <asm/fixmap.h>
#include <asm/setup.h>
#include <asm/sections.h>
+#include <asm/ptdump.h>

#include <mm/mmu_decl.h>

diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index e78832dce7bb..3686cd887c2f 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -45,6 +45,7 @@
#include <asm/sections.h>
#include <asm/firmware.h>
#include <asm/dma.h>
+#include <asm/ptdump.h>

#include <mm/mmu_decl.h>

diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c
index 2f9ddc29c535..d7b02bcd0691 100644
--- a/arch/powerpc/mm/ptdump/ptdump.c
+++ b/arch/powerpc/mm/ptdump/ptdump.c
@@ -23,6 +23,7 @@
#include <linux/const.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
+#include <asm/ptdump.h>

#include "ptdump.h"

--
2.13.3
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