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fix compilation with gcc 4.2 

gcc-4.2 is a lot more picky about its symbol handling.  EXPORT_SYMBOL no
longer works on symbols that are undefined or defined with static scope.

For example, with CONFIG_PROFILE off, I see:

  kernel/profile.c:206: error: __ksymtab_profile_event_unregister causes a section type conflict
  kernel/profile.c:205: error: __ksymtab_profile_event_register causes a section type conflict

This patch moves the EXPORTs inside the #ifdef CONFIG_PROFILE, so we
only try to export symbols that are defined.

Also, in kernel/kprobes.c there's an EXPORT_SYMBOL_GPL() for
jprobes_return, which if CONFIG_JPROBES is undefined is a static
inline and gives the same error.

And in drivers/acpi/resources/rsxface.c, there's an
ACPI_EXPORT_SYMBOPL() for a static symbol. If it's static, it's not
accessible from outside the compilation unit, so should bot be exported.

These three changes allow building a zx1_defconfig kernel with gcc 4.2
on IA64.

[akpm@linux-foundation.org: export jpobe_return properly]
Signed-off-by: Peter Chubb <peterc@gelato.unsw.edu.au>
Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Len Brown <lenb@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Peter Chubb 2007-08-10 13:01:10 -07:00 committed by Linus Torvalds
parent 6ddfca9548
commit cd5bfea278
3 changed files with 7 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/acpi/resources/rsxface.c
View File

@ -474,8 +474,6 @@ acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context)
return (AE_CTRL_TERMINATE);
}
ACPI_EXPORT_SYMBOL(acpi_rs_match_vendor_resource)
/*******************************************************************************
*
* FUNCTION: acpi_walk_resources

5
kernel/kprobes.c
View File

@ -1063,6 +1063,11 @@ EXPORT_SYMBOL_GPL(register_kprobe);
EXPORT_SYMBOL_GPL(unregister_kprobe);
EXPORT_SYMBOL_GPL(register_jprobe);
EXPORT_SYMBOL_GPL(unregister_jprobe);
#ifdef CONFIG_KPROBES
EXPORT_SYMBOL_GPL(jprobe_return);
#endif
#ifdef CONFIG_KPROBES
EXPORT_SYMBOL_GPL(register_kretprobe);
EXPORT_SYMBOL_GPL(unregister_kretprobe);
#endif

4
kernel/profile.c
View File

@ -199,11 +199,11 @@ EXPORT_SYMBOL_GPL(register_timer_hook);
EXPORT_SYMBOL_GPL(unregister_timer_hook);
EXPORT_SYMBOL_GPL(task_handoff_register);
EXPORT_SYMBOL_GPL(task_handoff_unregister);
EXPORT_SYMBOL_GPL(profile_event_register);
EXPORT_SYMBOL_GPL(profile_event_unregister);
#endif /* CONFIG_PROFILING */
EXPORT_SYMBOL_GPL(profile_event_register);
EXPORT_SYMBOL_GPL(profile_event_unregister);
#ifdef CONFIG_SMP
/*