[Xen-devel] [PATCH v2 1/5] X86/XEN: Remove the base argument from x86_init.paging.pagetable_setup_start

[Attilio Rao <attilio.rao@xxxxxxxxxx>]

x86_init.paging.pagetable_setup_start for native will however use
swapper_pg_dir in the single place where it is used and for native the
argument is simply unused. Aditionally, the comments already point to
swapper_pg_dir as the sole base touched.
Finally, this will help with further merging of
x86_init.paging.pagetable_setup_start with
x86_init.paging.pagetable_setup_done.

Signed-off-by: Attilio Rao <attilio.rao@xxxxxxxxxx>
---
 arch/x86/include/asm/pgtable_types.h |    6 +++---
 arch/x86/include/asm/x86_init.h      |    2 +-
 arch/x86/kernel/setup.c              |    2 +-
 arch/x86/kernel/x86_init.c           |    3 ++-
 arch/x86/mm/init_32.c                |    4 ++--
 arch/x86/xen/mmu.c                   |    2 +-
 6 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/pgtable_types.h 
b/arch/x86/include/asm/pgtable_types.h
index 013286a..e02b875 100644
--- a/arch/x86/include/asm/pgtable_types.h
+++ b/arch/x86/include/asm/pgtable_types.h
@@ -303,11 +303,11 @@ void set_pte_vaddr(unsigned long vaddr, pte_t pte);
 
 extern void native_pagetable_reserve(u64 start, u64 end);
 #ifdef CONFIG_X86_32
-extern void native_pagetable_setup_start(pgd_t *base);
+extern void native_pagetable_setup_start(void);
 extern void native_pagetable_setup_done(pgd_t *base);
 #else
-#define native_pagetable_setup_start x86_init_pgd_noop
-#define native_pagetable_setup_done  x86_init_pgd_noop
+#define native_pagetable_setup_start x86_init_pgd_start_noop
+#define native_pagetable_setup_done  x86_init_pgd_done_noop
 #endif
 
 struct seq_file;
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index 38155f6..782ba0c 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -85,7 +85,7 @@ struct x86_init_mapping {
  * @pagetable_setup_done:      platform specific post paging_init() call
  */
 struct x86_init_paging {
-       void (*pagetable_setup_start)(pgd_t *base);
+       void (*pagetable_setup_start)(void);
        void (*pagetable_setup_done)(pgd_t *base);
 };
 
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index f4b9b80..90cbbe0 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -961,7 +961,7 @@ void __init setup_arch(char **cmdline_p)
        kvmclock_init();
 #endif
 
-       x86_init.paging.pagetable_setup_start(swapper_pg_dir);
+       x86_init.paging.pagetable_setup_start();
        paging_init();
        x86_init.paging.pagetable_setup_done(swapper_pg_dir);
 
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 9f3167e..3b88493 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -26,7 +26,8 @@
 
 void __cpuinit x86_init_noop(void) { }
 void __init x86_init_uint_noop(unsigned int unused) { }
-void __init x86_init_pgd_noop(pgd_t *unused) { }
+void __init x86_init_pgd_start_noop(void) { }
+void __init x86_init_pgd_done_noop(pgd_t *unused) { }
 int __init iommu_init_noop(void) { return 0; }
 void iommu_shutdown_noop(void) { }
 
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index 575d86f..c4aa1b2 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -445,10 +445,10 @@ static inline void permanent_kmaps_init(pgd_t *pgd_base)
 }
 #endif /* CONFIG_HIGHMEM */
 
-void __init native_pagetable_setup_start(pgd_t *base)
+void __init native_pagetable_setup_start(void)
 {
        unsigned long pfn, va;
-       pgd_t *pgd;
+       pgd_t *pgd, *base = swapper_pg_dir;
        pud_t *pud;
        pmd_t *pmd;
        pte_t *pte;
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index b65a761..d89ea5c 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1174,7 +1174,7 @@ static void xen_exit_mmap(struct mm_struct *mm)
        spin_unlock(&mm->page_table_lock);
 }
 
-static void __init xen_pagetable_setup_start(pgd_t *base)
+static void __init xen_pagetable_setup_start(void)
 {
 }
 
-- 
1.7.2.5


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