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Messages in this thread Complete thread (EXPERIMENTAL)Patch in this message |
During compilation of the linus tree the following warnings are encountered:
WARNING: kernel/built-in.o(.data+0x2480): Section mismatch in reference from the variable workqueue_cpu_callback_nb.14223 to the function .devinit.text:workqueue_cpu_callback() The variable workqueue_cpu_callback_nb.14223 references the function __devinit workqueue_cpu_callback() If the reference is valid then annotate the variable with __init* (see linux/init.h) or name the variable: *driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console, This fix is to correct the following warning during compilation. Based on my "elementary" analysis, as it is called from other non-__init functions, this function cannot be declared as __devinit(), correct? Please comment. Thanks :-). Signed-off-by: Peter Teoh <htmldeveloper@gmail.com> Hi Peter. I changed this and the following warning from relay using following patch. Sam From 5fc28317ea634483360c43b015f230c68ad2c0f4 Mon Sep 17 00:00:00 2001 From: Sam Ravnborg <sam@ravnborg.org> Date: Thu, 31 Jan 2008 21:16:16 +0100 Subject: [PATCH] cpu: silence section mismatch warnings for hotcpu notifies The hotcpu_notifier is used to create notifiers to be called later. It really looks like the functions that are registered are only relevant in a HOTPLUG_CPU configuration and the correct fix was to wrap them in an #ifdef / #endif or similar. But for now just tell modpost to silence the warning by annotating the static variable with __refdata. This silences the following warnings in kernel/: WARNING: o-x86_64/kernel/built-in.o(.data+0x960): Section mismatch in reference from the variable profile_cpu_callback_nb.17240 to the function .devinit.text:profile_cpu_callback() WARNING: o-x86_64/kernel/built-in.o(.data+0x3fa0): Section mismatch in reference from the variable workqueue_cpu_callback_nb.14663 to the function .devinit.text:workqueue_cpu_callback() WARNING: o-x86_64/kernel/built-in.o(.data+0xe280): Section mismatch in reference from the variable relay_hotcpu_callback_nb.19247 to the function .cpuinit.text:relay_hotcpu_callback() Additional warnings are silenced with this change but they are left put. This patch is just a workaround for the bad practice to use __cpuinit to annotate code solely used for HOTPLUG_CPU. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Gautham R Shenoy <ego@in.ibm.com> --- include/linux/cpu.h | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) [view this diff only] diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 0be8d65..cebb8c0 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -109,7 +109,7 @@ static inline void cpuhotplug_mutex_unlock(struct mutex *cpu_hp_mutex)
extern void get_online_cpus(void);
extern void put_online_cpus(void);
#define hotcpu_notifier(fn, pri) { \
- static struct notifier_block fn##_nb = \
+ static struct notifier_block fn##_nb __refdata = \
{ .notifier_call = fn, .priority = pri }; \
register_cpu_notifier(&fn##_nb); \
}
--
1.5.4.rc3.14.g44397
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