From: Sebastian Andrzej Siewior Date: Sun, 3 Jun 2012 18:48:17 +0000 (+0200) Subject: scripts/modpost: check for bad references in .pci.fixups area X-Git-Tag: firefly_0821_release~3680^2~2368^2~16^2 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=bb15d8db7cce766b62cab624120916d25e94ac7a;p=firefly-linux-kernel-4.4.55.git 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 Cc: linux-kbuild@vger.kernel.org Cc: Rusty Russell Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Bjorn Helgaas --- diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c index 0f84bb38eb0d..68e9f5ed0a6f 100644 --- a/scripts/mod/modpost.c +++ b/scripts/mod/modpost.c @@ -865,6 +865,11 @@ static void check_section(const char *modname, struct elf_info *elf, #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 @@ const struct sectioncheck sectioncheck[] = { .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 },