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authorSam Ravnborg <sam@ravnborg.org>2012-07-26 11:02:16 (GMT)
committerDavid S. Miller <davem@davemloft.net>2012-07-26 23:46:15 (GMT)
commit881e02d298451e1788669662e72ccfd69859dae5 (patch)
treee1c7b96bd1a57e586df4534b4682f521774bcd13
parent7cdfbc74c8820cd33367fb3d61edcbe9829a06c5 (diff)
downloadlinux-881e02d298451e1788669662e72ccfd69859dae5.tar.xz
sparc32: drop swapper_pg_dir
We save one page of RAM dropping swapper_pg_dir. It was only used for an assignment in init-mm.c and we redid this later in srmmu.c anyway. This is likely a left-over from the sun4c removal. To avoid a dummy variable we use a simple #define swapper_pg_dir NULL Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--arch/sparc/include/asm/pgtable_32.h5
-rw-r--r--arch/sparc/kernel/head_32.S2
2 files changed, 3 insertions, 4 deletions
diff --git a/arch/sparc/include/asm/pgtable_32.h b/arch/sparc/include/asm/pgtable_32.h
index cbbbed5..c704f94 100644
--- a/arch/sparc/include/asm/pgtable_32.h
+++ b/arch/sparc/include/asm/pgtable_32.h
@@ -52,8 +52,9 @@ extern unsigned long calc_highpages(void);
#define PAGE_READONLY SRMMU_PAGE_RDONLY
#define PAGE_KERNEL SRMMU_PAGE_KERNEL
-/* Top-level page directory */
-extern pgd_t swapper_pg_dir[1024];
+/* Top-level page directory - dummy used by init-mm.
+ * srmmu.c will assign the real one (which is dynamically sized) */
+#define swapper_pg_dir NULL
extern void paging_init(void);
diff --git a/arch/sparc/kernel/head_32.S b/arch/sparc/kernel/head_32.S
index afeb1d7..3d92c0a 100644
--- a/arch/sparc/kernel/head_32.S
+++ b/arch/sparc/kernel/head_32.S
@@ -58,8 +58,6 @@ sun4e_notsup:
/* This was the only reasonable way I could think of to properly align
* these page-table data structures.
*/
- .globl swapper_pg_dir
-swapper_pg_dir: .skip PAGE_SIZE
.globl empty_zero_page
empty_zero_page: .skip PAGE_SIZE