[patch 1/5] Use EXTRARW_DATA in architectures
From: Mathieu Desnoyers
Date: Fri Jun 15 2007 - 16:37:35 EST
EXTRARW_DATA adds a place to declare rw data that will not be mixed with the
.data content; therefore limiting data cache pollution when data is put in
the EXTRARW_DATA sections.
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxx>
Cc: <linux-arch@xxxxxxxxxxxxxxx>
---
arch/alpha/kernel/vmlinux.lds.S | 1 +
arch/arm/kernel/vmlinux.lds.S | 1 +
arch/arm26/kernel/vmlinux-arm26-xip.lds.in | 1 +
arch/arm26/kernel/vmlinux-arm26.lds.in | 1 +
arch/avr32/kernel/vmlinux.lds.c | 1 +
arch/cris/arch-v10/vmlinux.lds.S | 1 +
arch/cris/arch-v32/vmlinux.lds.S | 1 +
arch/frv/kernel/vmlinux.lds.S | 1 +
arch/h8300/kernel/vmlinux.lds.S | 3 ++-
arch/i386/kernel/vmlinux.lds.S | 1 +
arch/ia64/kernel/vmlinux.lds.S | 1 +
arch/m32r/kernel/vmlinux.lds.S | 1 +
arch/m68k/kernel/vmlinux-std.lds | 1 +
arch/m68k/kernel/vmlinux-sun3.lds | 1 +
arch/m68knommu/kernel/vmlinux.lds.S | 1 +
arch/mips/kernel/vmlinux.lds.S | 3 +--
arch/parisc/kernel/vmlinux.lds.S | 1 +
arch/powerpc/kernel/vmlinux.lds.S | 2 ++
arch/ppc/kernel/vmlinux.lds.S | 1 +
arch/s390/kernel/vmlinux.lds.S | 1 +
arch/sh/kernel/vmlinux.lds.S | 2 +-
arch/sh64/kernel/vmlinux.lds.S | 1 +
arch/sparc/kernel/vmlinux.lds.S | 1 +
arch/sparc64/kernel/vmlinux.lds.S | 1 +
arch/um/kernel/dyn.lds.S | 1 +
arch/um/kernel/uml.lds.S | 1 +
arch/v850/kernel/vmlinux.lds.S | 1 +
arch/x86_64/kernel/vmlinux.lds.S | 1 +
arch/xtensa/kernel/vmlinux.lds.S | 4 +++-
include/asm-generic/vmlinux.lds.h | 5 +++++
30 files changed, 38 insertions(+), 5 deletions(-)
Index: linux-2.6-lttng/arch/alpha/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/alpha/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/alpha/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -90,6 +90,7 @@
_data = .;
.data : { /* Data */
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/arm/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/arm/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/arm/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -159,6 +159,7 @@
* and the usual data section
*/
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
_edata = .;
Index: linux-2.6-lttng/arch/arm26/kernel/vmlinux-arm26-xip.lds.in
===================================================================
--- linux-2.6-lttng.orig/arch/arm26/kernel/vmlinux-arm26-xip.lds.in 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/arm26/kernel/vmlinux-arm26-xip.lds.in 2007-06-15 16:14:08.000000000 -0400
@@ -112,6 +112,7 @@
* and the usual data section
*/
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
*(.init.data)
Index: linux-2.6-lttng/arch/arm26/kernel/vmlinux-arm26.lds.in
===================================================================
--- linux-2.6-lttng.orig/arch/arm26/kernel/vmlinux-arm26.lds.in 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/arm26/kernel/vmlinux-arm26.lds.in 2007-06-15 16:14:08.000000000 -0400
@@ -107,6 +107,7 @@
* and the usual data section
*/
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
_edata = .;
Index: linux-2.6-lttng/arch/avr32/kernel/vmlinux.lds.c
===================================================================
--- linux-2.6-lttng.orig/arch/avr32/kernel/vmlinux.lds.c 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/avr32/kernel/vmlinux.lds.c 2007-06-15 16:14:08.000000000 -0400
@@ -113,6 +113,7 @@
/* And the rest... */
*(.data.rel*)
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
_edata = .;
Index: linux-2.6-lttng/arch/cris/arch-v10/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/cris/arch-v10/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/cris/arch-v10/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -45,6 +45,7 @@
__Sdata = . ;
.data : { /* Data */
*(.data)
+ EXTRARW_DATA
}
__edata = . ; /* End of data section */
_edata = . ;
Index: linux-2.6-lttng/arch/cris/arch-v32/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/cris/arch-v32/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/cris/arch-v32/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -50,6 +50,7 @@
__Sdata = . ;
.data : { /* Data */
*(.data)
+ EXTRARW_DATA
}
__edata = . ; /* End of data section. */
_edata = . ;
Index: linux-2.6-lttng/arch/frv/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/frv/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/frv/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -139,6 +139,7 @@
DATA_DATA
*(.data.*)
*(.exit.data)
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/h8300/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/h8300/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/h8300/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -105,7 +105,8 @@
. = ALIGN(0x4) ;
DATA_DATA
. = ALIGN(0x4) ;
- *(.data.*)
+ *(.data.*)
+ EXTRARW_DATA
. = ALIGN(0x4) ;
___init_begin = .;
Index: linux-2.6-lttng/arch/i386/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/i386/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/i386/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -77,6 +77,7 @@
. = ALIGN(4096);
.data : AT(ADDR(.data) - LOAD_OFFSET) { /* Data */
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
} :data
Index: linux-2.6-lttng/arch/ia64/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/ia64/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/ia64/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -216,6 +216,7 @@
.data : AT(ADDR(.data) - LOAD_OFFSET)
{
DATA_DATA
+ EXTRARW_DATA
*(.data1)
*(.gnu.linkonce.d*)
CONSTRUCTORS
Index: linux-2.6-lttng/arch/m32r/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/m32r/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/m32r/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -51,6 +51,7 @@
*(.spu)
*(.spi)
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/m68k/kernel/vmlinux-std.lds
===================================================================
--- linux-2.6-lttng.orig/arch/m68k/kernel/vmlinux-std.lds 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/m68k/kernel/vmlinux-std.lds 2007-06-15 16:14:08.000000000 -0400
@@ -29,6 +29,7 @@
.data : { /* Data */
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/m68k/kernel/vmlinux-sun3.lds
===================================================================
--- linux-2.6-lttng.orig/arch/m68k/kernel/vmlinux-sun3.lds 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/m68k/kernel/vmlinux-sun3.lds 2007-06-15 16:14:08.000000000 -0400
@@ -24,6 +24,7 @@
.data : { /* Data */
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
. = ALIGN(16); /* Exception table */
__start___ex_table = .;
Index: linux-2.6-lttng/arch/m68knommu/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/m68knommu/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/m68knommu/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -134,6 +134,7 @@
. = ALIGN(4);
_sdata = . ;
DATA_DATA
+ EXTRARW_DATA
. = ALIGN(8192) ;
*(.data.init_task)
_edata = . ;
Index: linux-2.6-lttng/arch/mips/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/mips/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/mips/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -61,9 +61,8 @@
*/
. = ALIGN(_PAGE_SIZE);
*(.data.init_task)
-
DATA_DATA
-
+ EXTRARW_DATA
CONSTRUCTORS
}
_gp = . + 0x8000;
Index: linux-2.6-lttng/arch/parisc/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/parisc/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/parisc/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -92,6 +92,7 @@
. = ALIGN(L1_CACHE_BYTES);
.data : { /* Data */
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/powerpc/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/powerpc/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/powerpc/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -170,11 +170,13 @@
DATA_DATA
*(.sdata)
*(.got.plt) *(.got)
+ EXTRARW_DATA
}
#else
.data : {
*(.data .data.rel* .toc1)
*(.branch_lt)
+ EXTRARW_DATA
}
.opd : {
Index: linux-2.6-lttng/arch/ppc/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/ppc/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/ppc/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -73,6 +73,7 @@
*(.sdata2)
*(.got.plt) *(.got)
*(.dynamic)
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/s390/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/s390/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/s390/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -49,6 +49,7 @@
.data : { /* Data */
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/sh/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/sh/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/sh/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -49,7 +49,7 @@
*(.initrd)
. = ALIGN(PAGE_SIZE);
__rd_end = .;
-
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/sh64/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/sh64/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/sh64/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -79,6 +79,7 @@
.data : C_PHYS(.data) { /* Data */
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
Index: linux-2.6-lttng/arch/sparc/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/sparc/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/sparc/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -23,6 +23,7 @@
.data :
{
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
.data1 : { *(.data1) }
Index: linux-2.6-lttng/arch/sparc64/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/sparc64/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/sparc64/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -29,6 +29,7 @@
.data :
{
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
}
.data1 : { *(.data1) }
Index: linux-2.6-lttng/arch/um/kernel/dyn.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/um/kernel/dyn.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/um/kernel/dyn.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -101,6 +101,7 @@
*(.data.init_irqstack)
DATA_DATA
*(.data.* .gnu.linkonce.d.*)
+ EXTRARW_DATA
SORT(CONSTRUCTORS)
}
.data1 : { *(.data1) }
Index: linux-2.6-lttng/arch/um/kernel/uml.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/um/kernel/uml.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/um/kernel/uml.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -63,6 +63,7 @@
*(.data.init_irqstack)
DATA_DATA
*(.gnu.linkonce.d*)
+ EXTRARW_DATA
CONSTRUCTORS
}
.data1 : { *(.data1) }
Index: linux-2.6-lttng/arch/v850/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/v850/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/v850/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -116,6 +116,7 @@
DATA_DATA \
*(.exit.data) /* 2.5 convention */ \
*(.data.exit) /* 2.4 convention */ \
+ EXTRARW_DATA \
. = ALIGN (16) ; \
*(.data.cacheline_aligned) \
. = ALIGN (0x2000) ; \
Index: linux-2.6-lttng/arch/x86_64/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/x86_64/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/x86_64/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -63,6 +63,7 @@
/* Data */
.data : AT(ADDR(.data) - LOAD_OFFSET) {
DATA_DATA
+ EXTRARW_DATA
CONSTRUCTORS
} :data
Index: linux-2.6-lttng/arch/xtensa/kernel/vmlinux.lds.S
===================================================================
--- linux-2.6-lttng.orig/arch/xtensa/kernel/vmlinux.lds.S 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/arch/xtensa/kernel/vmlinux.lds.S 2007-06-15 16:14:08.000000000 -0400
@@ -118,7 +118,9 @@
_fdata = .;
.data :
{
- *(.data) CONSTRUCTORS
+ *(.data)
+ EXTRARW_DATA
+ CONSTRUCTORS
. = ALIGN(XCHAL_ICACHE_LINESIZE);
*(.data.cacheline_aligned)
}
Index: linux-2.6-lttng/include/asm-generic/vmlinux.lds.h
===================================================================
--- linux-2.6-lttng.orig/include/asm-generic/vmlinux.lds.h 2007-06-15 16:13:50.000000000 -0400
+++ linux-2.6-lttng/include/asm-generic/vmlinux.lds.h 2007-06-15 16:14:08.000000000 -0400
@@ -150,6 +150,11 @@
* All archs are supposed to use RO_DATA() */
#define RODATA RO_DATA(4096)
+/* EXTRARW_DATA adds a place to declare rw data that will not be mixed with the
+ * .data content; therefore limiting data cache pollution when data is put in
+ * the EXTRARW_DATA sections. */
+#define EXTRARW_DATA
+
#define SECURITY_INIT \
.security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
VMLINUX_SYMBOL(__security_initcall_start) = .; \
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
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