From: Jason Baron <jbaron@xxxxxxxxxx>
Subject: sparc: support static_key usage in non-module __exit sections
The jump table can reference text found in an __exit section. Thus,
instead of discarding it at build/link time, include EXIT_TEXT as part
of __init and release it at system boot time.
Without this patch the link fails with:
`.exit.text' referenced in section `__jump_table' of xxx.o:
defined in discarded section `.exit.text' of xxx.o
Link: http://lkml.kernel.org/r/d822da427ab07a02a394602eca687104ff682f83.1467837322.git.jbaron@xxxxxxxxxx
Signed-off-by: Jason Baron <jbaron@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Chris Metcalf <cmetcalf@xxxxxxxxxxxx>
Cc: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Joe Perches <joe@xxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sparc/kernel/vmlinux.lds.S | 7 +++++++
1 file changed, 7 insertions(+)
diff -puN arch/sparc/kernel/vmlinux.lds.S~sparc-support-static_key-usage-in-non-module-__exit-sections arch/sparc/kernel/vmlinux.lds.S
--- a/arch/sparc/kernel/vmlinux.lds.S~sparc-support-static_key-usage-in-non-module-__exit-sections
+++ a/arch/sparc/kernel/vmlinux.lds.S
@@ -150,6 +150,13 @@ SECTIONS
}
PERCPU_SECTION(SMP_CACHE_BYTES)
+#ifdef CONFIG_JUMP_LABEL
+ . = ALIGN(PAGE_SIZE);
+ .exit.text : {
+ EXIT_TEXT
+ }
+#endif
+
. = ALIGN(PAGE_SIZE);
__init_end = .;
BSS_SECTION(0, 0, 0)
_
--
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