The patch titled
Subject: tile: support static_key usage in non-module __exit sections
has been added to the -mm tree. Its filename is
tile-support-static_key-usage-in-non-module-__exit-sections.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/tile-support-static_key-usage-in-non-module-__exit-sections.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/tile-support-static_key-usage-in-non-module-__exit-sections.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/SubmitChecklist when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Chris Metcalf <cmetcalf@xxxxxxxxxxxx>
Subject: tile: support static_key usage in non-module __exit sections
Previously, all the __exit sections were just dropped by the link phase.
However, if there are static_key (jump label) constructs in __exit
sections that are not modules, the link fails with the message:
`.exit.text' referenced in section `__jump_table' of xxx.o:
defined in discarded section `.exit.text' of xxx.o
Support this usage by keeping the .exit.text sections in the final image
if JUMP_LABEL is defined, then discarding them once initialization is
complete.
Link: http://lkml.kernel.org/r/bfd7c107c610c30e992868ebfe2a5d796a097464.1467837322.git.jbaron@xxxxxxxxxx
Signed-off-by: Jason Baron <jbaron@xxxxxxxxxx>
Signed-off-by: Chris Metcalf <cmetcalf@xxxxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: Arnd Bergmann <arnd@xxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
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/tile/kernel/vmlinux.lds.S | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff -puN arch/tile/kernel/vmlinux.lds.S~tile-support-static_key-usage-in-non-module-__exit-sections arch/tile/kernel/vmlinux.lds.S
--- a/arch/tile/kernel/vmlinux.lds.S~tile-support-static_key-usage-in-non-module-__exit-sections
+++ a/arch/tile/kernel/vmlinux.lds.S
@@ -60,6 +60,18 @@ SECTIONS
/* "Init" is divided into two areas with very different virtual addresses. */
INIT_TEXT_SECTION(PAGE_SIZE)
+ /*
+ * Some things, like the __jump_table, may contain symbol references
+ * to __exit text, so include such text in the final image if so.
+ * In that case we also override the _einittext from INIT_TEXT_SECTION.
+ */
+#ifdef CONFIG_JUMP_LABEL
+ .exit.text : {
+ EXIT_TEXT
+ _einittext = .;
+ }
+#endif
+
/* Now we skip back to PAGE_OFFSET for the data. */
. = (. - TEXT_OFFSET + PAGE_OFFSET);
#undef LOAD_OFFSET
_
Patches currently in -mm which might be from cmetcalf@xxxxxxxxxxxx are
tile-support-static_key-usage-in-non-module-__exit-sections.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
