x86: fix set_fixmap to use phys_addr_t

Impact: fix kprobes crash on 32-bit with RAM above 4G

Use phys_addr_t for receiving a physical address argument
instead of unsigned long. This allows fixmap to handle
pages higher than 4GB on x86-32.

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: systemtap-ml <systemtap@sources.redhat.com>
Cc: Gary Hade <garyhade@us.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
LKML-Reference: <49DE3695.6040800@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

3 files changed, 8 insertions, 6 deletions

diff --git a/arch/x86/include/asm/fixmap.h b/arch/x86/include/asm/fixmap.h
index 81937a5dc77c..2d81af3974a0 100644
--- a/arch/x86/include/asm/fixmap.h
+++ b/arch/x86/include/asm/fixmap.h
@@ -151,11 +151,11 @@ extern pte_t *pkmap_page_table;
 
 void __native_set_fixmap(enum fixed_addresses idx, pte_t pte);
 void native_set_fixmap(enum fixed_addresses idx,
-                       unsigned long phys, pgprot_t flags);
+                       phys_addr_t phys, pgprot_t flags);
 
 #ifndef CONFIG_PARAVIRT
 static inline void __set_fixmap(enum fixed_addresses idx,
-                                unsigned long phys, pgprot_t flags)
+                                phys_addr_t phys, pgprot_t flags)
 {
         native_set_fixmap(idx, phys, flags);
 }
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index e5383e3d2f8c..73739322b6d0 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -193,8 +193,10 @@ extern void __iomem *ioremap_wc(resource_size_t offset, unsigned long size);
  */
 extern void early_ioremap_init(void);
 extern void early_ioremap_reset(void);
-extern void __iomem *early_ioremap(unsigned long offset, unsigned long size);
-extern void __iomem *early_memremap(unsigned long offset, unsigned long size);
+extern void __iomem *early_ioremap(resource_size_t phys_addr,
+                                   unsigned long size);
+extern void __iomem *early_memremap(resource_size_t phys_addr,
+                                    unsigned long size);
 extern void early_iounmap(void __iomem *addr, unsigned long size);
 
 #define IO_SPACE_LIMIT 0xffff
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h
index 7727aa8b7dda..378e3691c08c 100644
--- a/arch/x86/include/asm/paravirt.h
+++ b/arch/x86/include/asm/paravirt.h
@@ -347,7 +347,7 @@ struct pv_mmu_ops {
         /* Sometimes the physical address is a pfn, and sometimes its
            an mfn.  We can tell which is which from the index. */
         void (*set_fixmap)(unsigned /* enum fixed_addresses */ idx,
-                           unsigned long phys, pgprot_t flags);
+                           phys_addr_t phys, pgprot_t flags);
 };
 
 struct raw_spinlock;
@@ -1432,7 +1432,7 @@ static inline void arch_leave_lazy_mmu_mode(void)
 void arch_flush_lazy_mmu_mode(void);
 
 static inline void __set_fixmap(unsigned /* enum fixed_addresses */ idx,
-                                unsigned long phys, pgprot_t flags)
+                                phys_addr_t phys, pgprot_t flags)
 {
         pv_mmu_ops.set_fixmap(idx, phys, flags);
 }