Le 14/04/2021 à 04:54, Anshuman Khandual a écrit :
Currently most platforms define FIRST_USER_ADDRESS as 0UL duplicating the
same code all over. Instead define a new option ARCH_HAS_FIRST_USER_ADDRESS
for those platforms which would override generic default FIRST_USER_ADDRESS
value 0UL. This makes it much cleaner with reduced code.
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Signed-off-by: Anshuman Khandual <anshuman.khand...@arm.com>
---
arch/alpha/include/asm/pgtable.h | 1 -
arch/arc/include/asm/pgtable.h | 6 ------
arch/arm/Kconfig | 1 +
arch/arm64/include/asm/pgtable.h | 2 --
arch/csky/include/asm/pgtable.h | 1 -
arch/hexagon/include/asm/pgtable.h | 3 ---
arch/ia64/include/asm/pgtable.h | 1 -
arch/m68k/include/asm/pgtable_mm.h | 1 -
arch/microblaze/include/asm/pgtable.h | 2 --
arch/mips/include/asm/pgtable-32.h | 1 -
arch/mips/include/asm/pgtable-64.h | 1 -
arch/nds32/Kconfig | 1 +
arch/nios2/include/asm/pgtable.h | 2 --
arch/openrisc/include/asm/pgtable.h | 1 -
arch/parisc/include/asm/pgtable.h | 2 --
arch/powerpc/include/asm/book3s/pgtable.h | 1 -
arch/powerpc/include/asm/nohash/32/pgtable.h | 1 -
arch/powerpc/include/asm/nohash/64/pgtable.h | 2 --
arch/riscv/include/asm/pgtable.h | 2 --
arch/s390/include/asm/pgtable.h | 2 --
arch/sh/include/asm/pgtable.h | 2 --
arch/sparc/include/asm/pgtable_32.h | 1 -
arch/sparc/include/asm/pgtable_64.h | 3 ---
arch/um/include/asm/pgtable-2level.h | 1 -
arch/um/include/asm/pgtable-3level.h | 1 -
arch/x86/include/asm/pgtable_types.h | 2 --
arch/xtensa/include/asm/pgtable.h | 1 -
include/linux/mm.h | 4 ++++
mm/Kconfig | 4 ++++
29 files changed, 10 insertions(+), 43 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 8ba434287387..47098ccd715e 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -46,6 +46,10 @@ extern int sysctl_page_lock_unfairness;
void init_mm_internals(void);
+#ifndef ARCH_HAS_FIRST_USER_ADDRESS
I guess you didn't test it ..... :)
should be #ifndef CONFIG_ARCH_HAS_FIRST_USER_ADDRESS
+#define FIRST_USER_ADDRESS 0UL
+#endif
But why do we need a config option at all for that ?
Why not just:
#ifndef FIRST_USER_ADDRESS
#define FIRST_USER_ADDRESS 0UL
#endif
+
#ifndef CONFIG_NEED_MULTIPLE_NODES /* Don't use mapnrs, do it properly */
extern unsigned long max_mapnr;
diff --git a/mm/Kconfig b/mm/Kconfig
index 24c045b24b95..373fbe377075 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -806,6 +806,10 @@ config VMAP_PFN
config ARCH_USES_HIGH_VMA_FLAGS
bool
+
+config ARCH_HAS_FIRST_USER_ADDRESS
+ bool
+
config ARCH_HAS_PKEYS
bool
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