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Date: Sat, 19 Apr 2008 20:04:50 +0900
From: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
To: Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>
Cc: kosaki.motohiro@...fujitsu.com, Ingo Molnar <mingo@...e.hu>,
linux-kernel@...r.kernel.org,
Rusty Russell <rusty@...tcorp.com.au>,
"Frank Ch. Eigler" <fche@...hat.com>
Subject: Re: [RFC patch 16/27] Immediate Values Support init
> #else
>
> @@ -73,7 +76,9 @@ extern void imv_update_range(const struc
>
> static inline void core_imv_update(void) { }
> static inline void module_imv_update(void) { }
> -
> +static inline void imv_unref_core_init(void) { }
> +static inline void imv_unref_init(struct __imv *begin, struct __imv *end,
> + void *init, unsigned long init_size) { }
> #endif
err.
When turn off CONFIG_IMMEDIATE, "struct __imv" is not defined.
is cause following warnings.
include/linux/immediate.h:81: warning: 'struct __imv' declared inside parameter list
include/linux/immediate.h:81: warning: its scope is only this definition or declaration, \
which is probably not what you want
and
> +extern void imv_unref(struct __imv *begin, struct __imv *end, void *start,
> + unsigned long size);
>
> #else
>
> (snip)
> +static inline void imv_unref_init(struct __imv *begin, struct __imv *end,
> + void *init, unsigned long init_size) { }
> #endif
if CONFIG_IMMEDIATE is on, imv_unref() is declared.
but if CONFIG_IMMEDIATE is off, imv_unref_init() is declared instead imv_unref()
it cause following error.
CC kernel/module.o
kernel/module.c: In function 'sys_init_module':
kernel/module.c:2211: error: implicit declaration of function 'imv_unref'
kernel/module.c:2211: error: 'struct module' has no member named 'immediate'
kernel/module.c:2211: error: 'struct module' has no member named 'immediate'
kernel/module.c:2211: error: 'struct module' has no member named 'num_immediate'
make[1]: *** [kernel/module.o] Error 1
and,
in kernel/module.c#sys_init_module(),
immediate member of struct module is used though CONFIG_IMMEDIATE is off.
> imv_unref(mod->immediate, mod->immediate + mod->num_immediate,
> mod->module_init, mod->init_size);
it cause following error.
CC kernel/module.o
kernel/module.c: In function 'sys_init_module':
kernel/module.c:2211: error: 'struct module' has no member named 'immediate'
kernel/module.c:2211: error: 'struct module' has no member named 'immediate'
kernel/module.c:2211: error: 'struct module' has no member named 'num_immediate'
make[1]: *** [kernel/module.o] Error 1
bellow patch fixed these.
Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
---
include/linux/immediate.h | 8 ++++++--
include/linux/module.h | 21 +++++++++++++++++++++
kernel/module.c | 3 ++-
3 files changed, 29 insertions(+), 3 deletions(-)
Index: b/include/linux/immediate.h
===================================================================
--- a/include/linux/immediate.h 2008-04-19 19:53:03.000000000 +0900
+++ b/include/linux/immediate.h 2008-04-19 20:04:58.000000000 +0900
@@ -56,6 +56,10 @@ extern void imv_unref(struct __imv *begi
* Generic immediate values: a simple, standard, memory load.
*/
+/* empty declaration for avoid warning */
+struct __imv {
+};
+
/**
* imv_read - read immediate variable
* @name: immediate value name
@@ -77,8 +81,8 @@ extern void imv_unref(struct __imv *begi
static inline void core_imv_update(void) { }
static inline void module_imv_update(void) { }
static inline void imv_unref_core_init(void) { }
-static inline void imv_unref_init(struct __imv *begin, struct __imv *end,
- void *init, unsigned long init_size) { }
+static inline void imv_unref(struct __imv *begin, struct __imv *end,
+ void *start, unsigned long size) { }
#endif
#define DECLARE_IMV(type, name) extern __typeof__(type) name##__imv
Index: b/include/linux/module.h
===================================================================
--- a/include/linux/module.h 2008-04-19 19:53:03.000000000 +0900
+++ b/include/linux/module.h 2008-04-19 20:22:14.000000000 +0900
@@ -634,4 +634,25 @@ static inline void module_remove_modinfo
#define __MODULE_STRING(x) __stringify(x)
+#ifdef CONFIG_IMMEDIATE
+static inline struct __imv* mod_immediate_address(struct module* mod)
+{
+ return mod->immediate;
+}
+static inline unsigned int mod_num_immediate(struct module* mod)
+{
+ return mod->num_immediate;
+}
+#else
+static inline struct __imv* mod_immediate_address(struct module* mod)
+{
+ return NULL;
+}
+static inline unsigned int mod_num_immediate(struct module* mod)
+{
+ return 0;
+}
+#endif
+
+
#endif /* _LINUX_MODULE_H */
Index: b/kernel/module.c
===================================================================
--- a/kernel/module.c 2008-04-19 19:53:03.000000000 +0900
+++ b/kernel/module.c 2008-04-19 20:23:51.000000000 +0900
@@ -2208,7 +2208,8 @@ sys_init_module(void __user *umod,
/* Drop initial reference. */
module_put(mod);
unwind_remove_table(mod->unwind_info, 1);
- imv_unref(mod->immediate, mod->immediate + mod->num_immediate,
+ imv_unref(mod_immediate_address(mod),
+ mod_immediate_address(mod) + mod_num_immediate(mod),
mod->module_init, mod->init_size);
module_free(mod, mod->module_init);
mod->module_init = NULL;
--
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