From 04b19b773a60d201bc1b187ba7a7c86dc237a27b Mon Sep 17 00:00:00 2001 From: "Yann E. MORIN" Date: Tue, 6 Aug 2013 18:45:07 +0200 Subject: kconfig: silence warning when parsing auto.conf when a symbol has changed type When a symbol changes type from tristate to bool, and was previously set to 'm', a subsequent silentoldconfig would warn about inconsistency, such as: include/config/auto.conf:3014:warning: symbol value 'm' invalid for HOTPLUG_PCI_PCIE Seen by Linus with the merge in aa8032b (sequence to reproduce by Michal): git checkout 1fe0135 make mrproper make allmodconfig make silentoldconfig git checkout aa8032b make allmodconfig make silentoldconfig Since HOTPLUG_PCI_PCIE changed from tristate to bool in aa8032b, it was previously set to 'm' in auto.conf by the first allmodconfig+silentoldconfig, but then was set to 'y' by the second allmodconfig. Then the second silentoldconfig prints the warning. The warning in this case is a spurious warning, which happens at the time kconfig tries to detect symbols that have changed, to touch the empty header files in include/config used for dependency-tracking by make. Silence the warning when we read the old auto.conf file, since it is perfectly legit that a symbol changed type since the previous call. Thread in: http://marc.info/?l=linux-pci&m=137569198904000&w=2 Reported-by: Linus Torvalds Signed-off-by: "Yann E. MORIN" Cc: Linus Torvalds Cc: Michal Marek Cc: Thomas Petazzoni Cc: Bjorn Helgaas Cc: Yinghai Lu Cc: Benjamin Herrenschmidt --- scripts/kconfig/confdata.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) (limited to 'scripts/kconfig') diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c index c55c227af463..87f723804079 100644 --- a/scripts/kconfig/confdata.c +++ b/scripts/kconfig/confdata.c @@ -140,7 +140,9 @@ static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) sym->flags |= def_flags; break; } - conf_warning("symbol value '%s' invalid for %s", p, sym->name); + if (def != S_DEF_AUTO) + conf_warning("symbol value '%s' invalid for %s", + p, sym->name); return 1; case S_OTHER: if (*p != '"') { @@ -161,7 +163,8 @@ static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) memmove(p2, p2 + 1, strlen(p2)); } if (!p2) { - conf_warning("invalid string found"); + if (def != S_DEF_AUTO) + conf_warning("invalid string found"); return 1; } /* fall through */ @@ -172,7 +175,9 @@ static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) sym->def[def].val = strdup(p); sym->flags |= def_flags; } else { - conf_warning("symbol value '%s' invalid for %s", p, sym->name); + if (def != S_DEF_AUTO) + conf_warning("symbol value '%s' invalid for %s", + p, sym->name); return 1; } break; -- cgit v1.2.3