2010-07-07 11:12:45 +00:00
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From: Andreas Gruenbacher <agruen@suse.de>
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Subject: genksyms: add --override flag
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Patch-mainline: not yet
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Add --override flag to genksyms to allow overriding types with old
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definitions using the 'override' keyword. This is similar to -p --preserve,
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but it doesn't abort the build if a symtype cannot be preserved
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[mmarek: added KBUILD_OVERRIDE env var to set this globally for the entire
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build]
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---
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scripts/Makefile.build | 1 +
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scripts/genksyms/genksyms.c | 21 +++++++++++++++------
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2 files changed, 16 insertions(+), 6 deletions(-)
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--- a/scripts/Makefile.build
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+++ b/scripts/Makefile.build
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2011-04-19 20:09:59 +00:00
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@@ -161,6 +161,7 @@ cmd_gensymtypes =
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2010-07-07 11:12:45 +00:00
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$(CPP) -D__GENKSYMS__ $(c_flags) $< | \
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2011-04-19 20:09:59 +00:00
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$(GENKSYMS) $(if $(1), -T $(2)) -a $(ARCH) \
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2010-07-07 11:12:45 +00:00
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$(if $(KBUILD_PRESERVE),-p) \
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+ $(if $(KBUILD_OVERRIDE),-o) \
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2011-04-19 20:09:59 +00:00
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-r $(firstword $(wildcard $(2:.symtypes=.symref) /dev/null))
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2010-07-07 11:12:45 +00:00
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quiet_cmd_cc_symtypes_c = SYM $(quiet_modtag) $@
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--- a/scripts/genksyms/genksyms.c
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+++ b/scripts/genksyms/genksyms.c
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@@ -43,7 +43,7 @@ int cur_line = 1;
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char *cur_filename;
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static int flag_debug, flag_dump_defs, flag_reference, flag_dump_types,
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- flag_preserve, flag_warnings;
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+ flag_override, flag_preserve, flag_warnings;
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static const char *arch = "";
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static const char *mod_prefix = "";
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@@ -200,7 +200,7 @@ static struct symbol *__add_symbol(const
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sym->is_declared = 1;
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return sym;
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} else if (!sym->is_declared) {
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- if (sym->is_override && flag_preserve) {
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+ if (sym->is_override && flag_override) {
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print_location();
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fprintf(stderr, "ignoring ");
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print_type_name(type, name);
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@@ -586,11 +586,13 @@ void export_symbol(const char *name)
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struct symbol *n = sym->expansion_trail;
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if (sym->status != STATUS_UNCHANGED) {
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+ int fail = sym->is_override && flag_preserve;
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+
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if (!has_changed) {
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print_location();
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fprintf(stderr, "%s: %s: modversion "
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"changed because of changes "
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- "in ", flag_preserve ? "error" :
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+ "in ", fail ? "error" :
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"warning", name);
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} else
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fprintf(stderr, ", ");
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@@ -598,7 +600,7 @@ void export_symbol(const char *name)
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if (sym->status == STATUS_DEFINED)
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fprintf(stderr, " (became defined)");
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has_changed = 1;
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- if (flag_preserve)
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+ if (fail)
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errors++;
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}
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sym->expansion_trail = 0;
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@@ -655,6 +657,7 @@ static void genksyms_usage(void)
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" -D, --dump Dump expanded symbol defs (for debugging only)\n"
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" -r, --reference file Read reference symbols from a file\n"
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" -T, --dump-types file Dump expanded types into file\n"
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+ " -o, --override Allow to override reference modversions\n"
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" -p, --preserve Preserve reference modversions or fail\n"
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" -w, --warnings Enable warnings\n"
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" -q, --quiet Disable warnings (default)\n"
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@@ -666,6 +669,7 @@ static void genksyms_usage(void)
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" -D Dump expanded symbol defs (for debugging only)\n"
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" -r file Read reference symbols from a file\n"
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" -T file Dump expanded types into file\n"
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+ " -o Allow to override reference modversions\n"
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" -p Preserve reference modversions or fail\n"
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" -w Enable warnings\n"
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" -q Disable warnings (default)\n"
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@@ -690,15 +694,16 @@ int main(int argc, char **argv)
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{"reference", 1, 0, 'r'},
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{"dump-types", 1, 0, 'T'},
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{"preserve", 0, 0, 'p'},
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+ {"override", 0, 0, 'o'},
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{"version", 0, 0, 'V'},
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{"help", 0, 0, 'h'},
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{0, 0, 0, 0}
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};
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- while ((o = getopt_long(argc, argv, "a:dwqVDr:T:ph",
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+ while ((o = getopt_long(argc, argv, "a:dwqVDr:T:oph",
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&long_opts[0], NULL)) != EOF)
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#else /* __GNU_LIBRARY__ */
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- while ((o = getopt(argc, argv, "a:dwqVDr:T:ph")) != EOF)
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+ while ((o = getopt(argc, argv, "a:dwqVDr:T:oph")) != EOF)
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#endif /* __GNU_LIBRARY__ */
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switch (o) {
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case 'a':
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@@ -735,7 +740,11 @@ int main(int argc, char **argv)
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return 1;
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}
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break;
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+ case 'o':
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+ flag_override = 1;
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+ break;
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case 'p':
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+ flag_override = 1;
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flag_preserve = 1;
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break;
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case 'h':
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