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Commit 8e70c458 authored by Sam Ravnborg's avatar Sam Ravnborg
Browse files

kbuild: warn about duplicate exported symbols 



In modpost introduce a check for symbols exported twice.
This check caught only one victim (inet_bind_bucket_create) for
which a patch is already sent to netdev.

Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
parent 040fcc81

scripts/mod/modpost.c

+13 −3
Original line number Diff line number Diff line
@@ -117,6 +117,7 @@ struct symbol { 
	unsigned int vmlinux:1;    /* 1 if symbol is defined in vmlinux */

	unsigned int kernel:1;     /* 1 if symbol is from kernel

				    *  (only for external modules) **/

	unsigned int preloaded:1;  /* 1 if symbol from Module.symvers */

	char name[0];

};
@@ -186,9 +187,17 @@ static struct symbol *sym_add_exported(const char *name, struct module *mod) 
{

	struct symbol *s = find_symbol(name);



	if (!s)

	if (!s) {

		s = new_symbol(name, mod);



	} else {

		if (!s->preloaded) {

			warn("%s: duplicate symbol '%s' previous definition "

			     "was in %s%s\n", mod->name, name,

			     s->module->name,

			     is_vmlinux(s->module->name) ?"":".ko");

		}

	}

	s->preloaded = 0;

	s->vmlinux   = is_vmlinux(mod->name);

	s->kernel    = 0;

	return s;
@@ -707,6 +716,7 @@ static void read_dump(const char *fname, unsigned int kernel) 
		}

		s = sym_add_exported(symname, mod);

		s->kernel    = kernel;

		s->preloaded = 1;

		sym_update_crc(symname, mod, crc);

	}

	return;