scripts/modpost: check for bad references in .pci.fixups area
Functions used for PCI fixups (like DECLARE_PCI_FIXUP_HEADER) are often
marked __init. This is okay as long as nobody is using PCI hotplug.
However if one does execute
| echo 1 > /sys/bus/pci/rescan
and we hit a module which is marked __init istead of __devinit then we
go boom because the code is removed after the kernel booted. This patch
help to see those section mismatches.
Cc: Michal Marek <mmarek@suse.cz>
Cc: linux-kbuild@vger.kernel.org
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 0f84bb3..68e9f5ed 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -865,6 +865,11 @@
#define ALL_EXIT_TEXT_SECTIONS \
".exit.text$", ".devexit.text$", ".cpuexit.text$", ".memexit.text$"
+#define ALL_PCI_INIT_SECTIONS \
+ ".pci_fixup_early$", ".pci_fixup_header$", ".pci_fixup_final$", \
+ ".pci_fixup_enable$", ".pci_fixup_resume$", \
+ ".pci_fixup_resume_early$", ".pci_fixup_suspend$"
+
#define ALL_XXXINIT_SECTIONS DEV_INIT_SECTIONS, CPU_INIT_SECTIONS, \
MEM_INIT_SECTIONS
#define ALL_XXXEXIT_SECTIONS DEV_EXIT_SECTIONS, CPU_EXIT_SECTIONS, \
@@ -1027,6 +1032,12 @@
.mismatch = ANY_EXIT_TO_ANY_INIT,
.symbol_white_list = { DEFAULT_SYMBOL_WHITE_LIST, NULL },
},
+{
+ .fromsec = { ALL_PCI_INIT_SECTIONS, NULL },
+ .tosec = { INIT_SECTIONS, NULL },
+ .mismatch = ANY_INIT_TO_ANY_EXIT,
+ .symbol_white_list = { NULL },
+},
/* Do not export init/exit functions or data */
{
.fromsec = { "__ksymtab*", NULL },