path: root/lib
diff options
authorSam Ravnborg <sam@ravnborg.org>2008-01-24 21:12:37 +0100
committerSam Ravnborg <sam@ravnborg.org>2008-01-28 23:21:18 +0100
commit588ccd732ba2d32db8228802ef9283b583d3395f (patch)
tree435ad4432c165190d70b82f8392c37b375679b53 /lib
parentf5eaa323eb6819d2f737ead42464efccaf2b98b9 (diff)
kbuild: add verbose option to Section mismatch reporting in modpost
If the config option CONFIG_SECTION_MISMATCH is not set and we see a Section mismatch present the following to the user: modpost: Found 1 section mismatch(es). To see additional details select "Enable full Section mismatch analysis" in the Kernel Hacking menu (CONFIG_SECTION_MISMATCH). If the option CONFIG_SECTION_MISMATCH is selected then be verbose in the Section mismatch reporting from mdopost. Sample outputs: WARNING: o-x86_64/vmlinux.o(.text+0x7396): Section mismatch in reference from the function discover_ebda() to the variable .init.data:ebda_addr The function discover_ebda() references the variable __initdata ebda_addr. This is often because discover_ebda lacks a __initdata annotation or the annotation of ebda_addr is wrong. WARNING: o-x86_64/vmlinux.o(.data+0x74d58): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_plx9050_exit() The variable pci_serial_quirks references the function __devexit pci_plx9050_exit() If the reference is valid then annotate the variable with __exit* (see linux/init.h) or name the variable: *driver, *_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console, WARNING: o-x86_64/vmlinux.o(__ksymtab+0x630): Section mismatch in reference from the variable __ksymtab_arch_register_cpu to the function .cpuinit.text:arch_register_cpu() The symbol arch_register_cpu is exported and annotated __cpuinit Fix this by removing the __cpuinit annotation of arch_register_cpu or drop the export. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Diffstat (limited to 'lib')
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 748e72be6e6..c4ecb2994ba 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -108,6 +108,8 @@ config DEBUG_SECTION_MISMATCH
will tell where the mismatch happens much closer to the
source. The drawback is that we will report the same
mismatch at least twice.
+ - Enable verbose reporting from modpost to help solving
+ the section mismatches reported.
bool "Kernel debugging"