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Subject[PATCH v1 06/10] powerpc/mm: make ioremap_bot common to all
Date
Drop multiple definitions of ioremap_bot and make one common to
all subarches.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
arch/powerpc/include/asm/book3s/32/pgtable.h | 2 --
arch/powerpc/include/asm/book3s/64/pgtable.h | 1 -
arch/powerpc/include/asm/nohash/32/pgtable.h | 2 --
arch/powerpc/include/asm/pgtable.h | 2 ++
arch/powerpc/mm/ioremap.c | 3 +++
arch/powerpc/mm/mmu_decl.h | 1 -
arch/powerpc/mm/nohash/tlb.c | 2 ++
arch/powerpc/mm/pgtable_32.c | 3 ---
arch/powerpc/mm/pgtable_64.c | 3 ---
9 files changed, 7 insertions(+), 12 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index 838de59f6754..aa1bc5f8da90 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -201,8 +201,6 @@ int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
#include <linux/sched.h>
#include <linux/threads.h>

-extern unsigned long ioremap_bot;
-
/* Bits to mask out from a PGD to get to the PUD page */
#define PGD_MASKED_BITS 0

diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 8308f32e9782..11819e3c755e 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -289,7 +289,6 @@ extern unsigned long __kernel_io_end;
#define KERN_IO_END __kernel_io_end

extern struct page *vmemmap;
-extern unsigned long ioremap_bot;
extern unsigned long pci_io_base;
#endif /* __ASSEMBLY__ */

diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index 0284f8f5305f..7ce2a7c9fade 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -11,8 +11,6 @@
#include <asm/mmu.h> /* For sub-arch specific PPC_PIN_SIZE */
#include <asm/asm-405.h>

-extern unsigned long ioremap_bot;
-
#ifdef CONFIG_44x
extern int icache_44x_need_flush;
#endif
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index c58ba7963688..c54bb68c1354 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -68,6 +68,8 @@ extern pgd_t swapper_pg_dir[];

extern void paging_init(void);

+extern unsigned long ioremap_bot;
+
/*
* kern_addr_valid is intended to indicate whether an address is a valid
* kernel address. Most 32-bit archs define it as always true (like this)
diff --git a/arch/powerpc/mm/ioremap.c b/arch/powerpc/mm/ioremap.c
index a44d9e4c948a..0c23660522ca 100644
--- a/arch/powerpc/mm/ioremap.c
+++ b/arch/powerpc/mm/ioremap.c
@@ -3,6 +3,9 @@
#include <linux/io.h>
#include <asm/io-workarounds.h>

+unsigned long ioremap_bot;
+EXPORT_SYMBOL(ioremap_bot);
+
void __iomem *__ioremap(phys_addr_t addr, unsigned long size, unsigned long flags)
{
return __ioremap_caller(addr, size, __pgprot(flags), __builtin_return_address(0));
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index 32c1a191c28a..6ee64d5e2824 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -108,7 +108,6 @@ extern u8 early_hash[];

#endif /* CONFIG_PPC32 */

-extern unsigned long ioremap_bot;
extern unsigned long __max_low_memory;
extern phys_addr_t __initial_memory_limit_addr;
extern phys_addr_t total_memory;
diff --git a/arch/powerpc/mm/nohash/tlb.c b/arch/powerpc/mm/nohash/tlb.c
index d4acf6fa0596..350a54f70a37 100644
--- a/arch/powerpc/mm/nohash/tlb.c
+++ b/arch/powerpc/mm/nohash/tlb.c
@@ -704,6 +704,8 @@ static void __init early_init_mmu_global(void)
* for use by the TLB miss code
*/
linear_map_top = memblock_end_of_DRAM();
+
+ ioremap_bot = IOREMAP_END;
}

static void __init early_mmu_set_memory_limit(void)
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 8126c2d1afbf..7efdb1dee19b 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -33,9 +33,6 @@

#include <mm/mmu_decl.h>

-unsigned long ioremap_bot;
-EXPORT_SYMBOL(ioremap_bot); /* aka VMALLOC_END */
-
extern char etext[], _stext[], _sinittext[], _einittext[];

void __iomem *
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 0f0b1e1ea5ab..d631659c8859 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -99,9 +99,6 @@ unsigned long __pte_frag_nr;
EXPORT_SYMBOL(__pte_frag_nr);
unsigned long __pte_frag_size_shift;
EXPORT_SYMBOL(__pte_frag_size_shift);
-unsigned long ioremap_bot;
-#else /* !CONFIG_PPC_BOOK3S_64 */
-unsigned long ioremap_bot = IOREMAP_END;
#endif

int __weak ioremap_range(unsigned long ea, phys_addr_t pa, unsigned long size, pgprot_t prot, int nid)
--
2.13.3
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