Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=312b1485fb509c9bc32eda28ad29537896658cb8
Commit: 312b1485fb509c9bc32eda28ad29537896658cb8
Parent: e241a630374e06aecdae2884af8b652d3b4d6c37
Author: Sam Ravnborg <[EMAIL PROTECTED]>
AuthorDate: Mon Jan 28 20:21:15 2008 +0100
Committer: Sam Ravnborg <[EMAIL PROTECTED]>
CommitDate: Mon Jan 28 23:21:19 2008 +0100
Introduce new section reference annotations tags: __ref, __refdata,
__refconst
Today we have the following annotations for functions/data
referencing __init/__exit functions / data:
__init_refok => for init functions
__initdata_refok => for init data
__exit_refok => for exit functions
There is really no difference between the __init and __exit
versions and simplify it and to introduce a shorter annotation
the following new annotations are introduced:
__ref => for functions (code) that
references __*init / __*exit
__refdata => for variables
__refconst => for const variables
Whit this annotation is it more obvious what the annotation
is for and there is no longer the arbitary division
between __init and __exit code.
The mechanishm is the same as before - a special section
is created which is made part of the usual sections
in the linker script.
We will start to see annotations like this:
-static struct pci_serial_quirk pci_serial_quirks[] = {
+static const struct pci_serial_quirk pci_serial_quirks[] __refconst = {
-----------------
-static struct notifier_block __cpuinitdata cpuid_class_cpu_notifier =
+static struct notifier_block cpuid_class_cpu_notifier __refdata =
----------------
-static int threshold_cpu_callback(struct notifier_block *nfb,
+static int __ref threshold_cpu_callback(struct notifier_block *nfb,
[The above is just random samples].
Note: No modifications were needed in modpost
to support the new sections due to the newly introduced
blacklisting.
Signed-off-by: Sam Ravnborg <[EMAIL PROTECTED]>
---
include/asm-generic/vmlinux.lds.h | 3 +++
include/linux/init.h | 34 +++++++++++++++++++++++++++-------
2 files changed, 30 insertions(+), 7 deletions(-)
diff --git a/include/asm-generic/vmlinux.lds.h
b/include/asm-generic/vmlinux.lds.h
index 2948530..76df771 100644
--- a/include/asm-generic/vmlinux.lds.h
+++ b/include/asm-generic/vmlinux.lds.h
@@ -42,6 +42,7 @@
#define DATA_DATA \
*(.data) \
*(.data.init.refok) \
+ *(.ref.data) \
DEV_KEEP(init.data) \
DEV_KEEP(exit.data) \
CPU_KEEP(init.data) \
@@ -169,6 +170,7 @@
\
/* __*init sections */ \
__init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
+ *(.ref.rodata) \
DEV_KEEP(init.rodata) \
DEV_KEEP(exit.rodata) \
CPU_KEEP(init.rodata) \
@@ -202,6 +204,7 @@
#define TEXT_TEXT \
ALIGN_FUNCTION(); \
*(.text) \
+ *(.ref.text) \
*(.text.init.refok) \
*(.exit.text.refok) \
DEV_KEEP(init.text) \
diff --git a/include/linux/init.h b/include/linux/init.h
index dde1eaa..2efbda0 100644
--- a/include/linux/init.h
+++ b/include/linux/init.h
@@ -52,12 +52,26 @@
* when early init has completed so all such references are potential bugs.
* For exit sections the same issue exists.
* The following markers are used for the cases where the reference to
- * the init/exit section (code or data) is valid and will teach modpost
- * not to issue a warning.
+ * the *init / *exit section (code or data) is valid and will teach
+ * modpost not to issue a warning.
* The markers follow same syntax rules as __init / __initdata. */
-#define __init_refok noinline __section(.text.init.refok)
-#define __initdata_refok __section(.data.init.refok)
-#define __exit_refok noinline __section(.exit.text.refok)
+#define __ref __section(.ref.text) noinline
+#define __refdata __section(.ref.data)
+#define __refconst __section(.ref.rodata)
+
+/* backward compatibility note
+ * A few places hardcode the old section names:
+ * .text.init.refok
+ * .data.init.refok
+ * .exit.text.refok
+ * They should be converted to use the defines from this file
+ */
+
+/* compatibility defines */
+#define __init_refok __ref
+#define __initdata_refok __refdata
+#define __exit_refok __ref
+
#ifdef MODULE
#define __exitused
@@ -93,11 +107,9 @@
/* For assembly routines */
#define __INIT .section ".init.text","ax"
-#define __INIT_REFOK .section ".text.init.refok","ax"
#define __FINIT .previous
#define __INITDATA .section ".init.data","aw"
-#define __INITDATA_REFOK .section ".data.init.refok","aw"
#define __DEVINIT .section ".devinit.text", "ax"
#define __DEVINITDATA .section ".devinit.data", "aw"
@@ -108,6 +120,14 @@
#define __MEMINIT .section ".meminit.text", "ax"
#define __MEMINITDATA .section ".meminit.data", "aw"
+/* silence warnings when references are OK */
+#define __REF .section ".ref.text", "ax"
+#define __REFDATA .section ".ref.data", "aw"
+#define __REFCONST .section ".ref.rodata", "aw"
+/* backward compatibility */
+#define __INIT_REFOK .section __REF
+#define __INITDATA_REFOK .section __REFDATA
+
#ifndef __ASSEMBLY__
/*
* Used for initialization calls..
-
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