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authorChristoph Lameter <clameter@engr.sgi.com>2005-12-12 12:34:32 -0500
committerTony Luck <tony.luck@intel.com>2005-12-16 13:52:46 -0500
commitdc86e88c2bb8a7603ee175fbb6a9e92cf3293dd8 (patch)
treea15905f02969ba9471b8cfd28f7dc041189dabb5 /arch/ia64/kernel
parentd5bf3165b6fbb879a4658f9da9ca2fe002b75f08 (diff)
[IA64] Add __read_mostly support for IA64
sparc64, i386 and x86_64 have support for a special data section dedicated to rarely updated data that is frequently read. The section was created to avoid false sharing of those rarely read data with frequently written kernel data. This patch creates such a data section for ia64 and will group rarely written data into this section. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
Diffstat (limited to 'arch/ia64/kernel')
-rw-r--r--arch/ia64/kernel/vmlinux.lds.S3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/ia64/kernel/vmlinux.lds.S b/arch/ia64/kernel/vmlinux.lds.S
index 30d8564e9603..73af6267d2ef 100644
--- a/arch/ia64/kernel/vmlinux.lds.S
+++ b/arch/ia64/kernel/vmlinux.lds.S
@@ -177,6 +177,9 @@ SECTIONS
177 } 177 }
178 . = ALIGN(PAGE_SIZE); /* make sure the gate page doesn't expose kernel data */ 178 . = ALIGN(PAGE_SIZE); /* make sure the gate page doesn't expose kernel data */
179 179
180 .data.read_mostly : AT(ADDR(.data.read_mostly) - LOAD_OFFSET)
181 { *(.data.read_mostly) }
182
180 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET) 183 .data.cacheline_aligned : AT(ADDR(.data.cacheline_aligned) - LOAD_OFFSET)
181 { *(.data.cacheline_aligned) } 184 { *(.data.cacheline_aligned) }
182 185