[PATCH] ppc64: Updated Olof misc updates 3/3

Replace some of the hard-coded constants with PAGE_SIZE/SHIFT/ORDER where
appropriate.

Likewise, in a couple of places it doesn't make sense to base some
allocations on page size when all that's required is a constant 4K,
etc.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

6 files changed, 18 insertions, 13 deletions

diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S
index 72c61041151a..22a5ee07e1ea 100644
--- a/arch/ppc64/kernel/head.S
+++ b/arch/ppc64/kernel/head.S
@@ -1992,7 +1992,7 @@ _GLOBAL(smp_release_cpus)
  */
         .section ".bss"
 
-        .align  12
+        .align  PAGE_SHIFT
 
         .globl  empty_zero_page
 empty_zero_page:
diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S
index e7241ad80a08..a25b59759ddb 100644
--- a/arch/ppc64/kernel/misc.S
+++ b/arch/ppc64/kernel/misc.S
@@ -329,7 +329,7 @@ _GLOBAL(__flush_dcache_icache)
 
 /* Flush the dcache */
         ld      r7,PPC64_CACHES@toc(r2)
-        clrrdi  r3,r3,12                    /* Page align */
+        clrrdi  r3,r3,PAGE_SHIFT                    /* Page align */
         lwz     r4,DCACHEL1LINESPERPAGE(r7)     /* Get # dcache lines per page */
         lwz     r5,DCACHEL1LINESIZE(r7)         /* Get dcache line size */
         mr      r6,r3
diff --git a/arch/ppc64/kernel/vmlinux.lds.S b/arch/ppc64/kernel/vmlinux.lds.S
index 0306510bc4ff..f34d514432ac 100644
--- a/arch/ppc64/kernel/vmlinux.lds.S
+++ b/arch/ppc64/kernel/vmlinux.lds.S
@@ -1,3 +1,4 @@
+#include <asm/page.h>
 #include <asm-generic/vmlinux.lds.h>
 
 OUTPUT_ARCH(powerpc:common64)
@@ -17,7 +18,7 @@ SECTIONS
         LOCK_TEXT
         KPROBES_TEXT
         *(.fixup)
-        . = ALIGN(4096);
+        . = ALIGN(PAGE_SIZE);
         _etext = .;
         }
 
@@ -43,7 +44,7 @@ SECTIONS
 
 
   /* will be freed after init */
-  . = ALIGN(4096);
+  . = ALIGN(PAGE_SIZE);
   __init_begin = .;
 
   .init.text : {
@@ -83,7 +84,7 @@ SECTIONS
 
   SECURITY_INIT
 
-  . = ALIGN(4096);
+  . = ALIGN(PAGE_SIZE);
   .init.ramfs : {
         __initramfs_start = .;
         *(.init.ramfs)
@@ -96,18 +97,21 @@ SECTIONS
         __per_cpu_end = .;
         }
 
+  . = ALIGN(PAGE_SIZE);
   . = ALIGN(16384);
   __init_end = .;
   /* freed after init ends here */
 
 
   /* Read/write sections */
+  . = ALIGN(PAGE_SIZE);
   . = ALIGN(16384);
   /* The initial task and kernel stack */
   .data.init_task : {
         *(.data.init_task)
         }
 
+  . = ALIGN(PAGE_SIZE);
   .data.page_aligned : {
         *(.data.page_aligned)
         }
@@ -129,18 +133,18 @@ SECTIONS
         __toc_start = .;
         *(.got)
         *(.toc)
-        . = ALIGN(4096);
+        . = ALIGN(PAGE_SIZE);
         _edata = .;
         }
 
 
-  . = ALIGN(4096);
+  . = ALIGN(PAGE_SIZE);
   .bss : {
         __bss_start = .;
         *(.bss)
         __bss_stop = .;
         }
 
-  . = ALIGN(4096);
+  . = ALIGN(PAGE_SIZE);
   _end = . ;
 }
diff --git a/include/asm-ppc64/elf.h b/include/asm-ppc64/elf.h
index c919a89343db..e27c2942953c 100644
--- a/include/asm-ppc64/elf.h
+++ b/include/asm-ppc64/elf.h
@@ -5,6 +5,7 @@
 #include <asm/ptrace.h>
 #include <asm/cputable.h>
 #include <asm/auxvec.h>
+#include <asm/page.h>
 
 /* PowerPC relocations defined by the ABIs */
 #define R_PPC_NONE              0
@@ -146,7 +147,7 @@ typedef elf_vrreg_t elf_vrregset_t32[ELF_NVRREG32];
 #define elf_check_arch(x) ((x)->e_machine == ELF_ARCH)
 
 #define USE_ELF_CORE_DUMP
-#define ELF_EXEC_PAGESIZE       4096
+#define ELF_EXEC_PAGESIZE       PAGE_SIZE
 
 /* This is the location that an ET_DYN program is loaded if exec'ed.  Typical
    use of this is to invoke "./ld.so someprog" to test out a new version of
diff --git a/include/asm-ppc64/mmu.h b/include/asm-ppc64/mmu.h
index 737e85a5ce3c..d2b0b796d35e 100644
--- a/include/asm-ppc64/mmu.h
+++ b/include/asm-ppc64/mmu.h
@@ -30,7 +30,7 @@
 
 /* Location of cpu0's segment table */
 #define STAB0_PAGE      0x6
-#define STAB0_PHYS_ADDR (STAB0_PAGE<<PAGE_SHIFT)
+#define STAB0_PHYS_ADDR (STAB0_PAGE<<12)
 
 #ifndef __ASSEMBLY__
 extern char initial_stab[];
diff --git a/include/asm-ppc64/thread_info.h b/include/asm-ppc64/thread_info.h
index 0494df6fca74..71244d8a427d 100644
--- a/include/asm-ppc64/thread_info.h
+++ b/include/asm-ppc64/thread_info.h
@@ -54,9 +54,9 @@ struct thread_info {
 
 /* thread information allocation */
 
-#define THREAD_ORDER            2
-#define THREAD_SIZE             (PAGE_SIZE << THREAD_ORDER)
-#define THREAD_SHIFT            (PAGE_SHIFT + THREAD_ORDER)
+#define THREAD_SHIFT            14
+#define THREAD_ORDER            (THREAD_SHIFT - PAGE_SHIFT)
+#define THREAD_SIZE             (1 << THREAD_SHIFT)
 #ifdef CONFIG_DEBUG_STACK_USAGE
 #define alloc_thread_info(tsk)                                  \
         ({                                                      \