commit f110e0fec89935879a76aebe1726dce3fcb6ab13
author Nicolas Pitre <nicolas.pitre@linaro.org> Thu Apr 28 17:29:42 2016 -0400
committer Michal Marek <mmarek@suse.com> Tue May 10 17:24:15 2016 +0200
tree 04c8cca7d820a8ee1fd798041d4568aa830d8497
parent e72e2dfe7c16ffbfbabf9cb24adc6d9f93a4fe37

kbuild: fix ksym_dep_filter when multiple EXPORT_SYMBOL() on the same line

In kernel/cgroup.c there is:

    #define SUBSYS(_x)                                             \
        DEFINE_STATIC_KEY_TRUE(_x ## _cgrp_subsys_enabled_key);    \
        DEFINE_STATIC_KEY_TRUE(_x ## _cgrp_subsys_on_dfl_key);     \
        EXPORT_SYMBOL_GPL(_x ## _cgrp_subsys_enabled_key);         \
        EXPORT_SYMBOL_GPL(_x ## _cgrp_subsys_on_dfl_key);

The expansion of this macro causes multiple EXPORT_SYMBOL_GPL() instances
to appear on the same preprocessor line output, confusing the sed script
expecting only one of them per line.  Unfortunately this can't be fixed
nicely in the sed script as sed's regexp can't do non greedy matching.

Fix this by turning any semicolon into a line break before filtering.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Michal Marek <mmarek@suse.com>

scripts/Kbuild.include

diff --git a/scripts/Kbuild.include b/scripts/Kbuild.include
index 36e9475..1f0d41c 100644
--- a/scripts/Kbuild.include
+++ b/scripts/Kbuild.include
@@ -281,7 +281,7 @@
 	    $(CPP) $(call flags_nodeps,a_flags) -D__KSYM_DEPS__ $< ;;        \
 	  boot*|build*|*cpp_lds_S|dtc|host*|vdso*) : ;;                      \
 	  *) echo "Don't know how to preprocess $(1)" >&2; false ;;          \
-	esac | sed -rn 's/^.*=== __KSYM_(.*) ===.*$$/KSYM_\1/p'
+	esac | tr ";" "\n" | sed -rn 's/^.*=== __KSYM_(.*) ===.*$$/KSYM_\1/p'
 
 cmd_and_fixdep =                                                             \
 	$(echo-cmd) $(cmd_$(1));                                             \