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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-12-30 18:14:15 +0300
committerMasahiro Yamada <yamada.masahiro@socionext.com>2019-01-06 03:46:51 +0300
commite9666d10a5677a494260d60d1fa0b73cc7646eb3 (patch)
treefd609e683efff32ed6cc1458e20c40969328a33e /kernel/jump_label.c
parent72d3ebb929de339f991fc49b58942d2d5ecdb753 (diff)
downloadlinux-e9666d10a5677a494260d60d1fa0b73cc7646eb3.tar.xz
jump_label: move 'asm goto' support test to Kconfig
Currently, CONFIG_JUMP_LABEL just means "I _want_ to use jump label". The jump label is controlled by HAVE_JUMP_LABEL, which is defined like this: #if defined(CC_HAVE_ASM_GOTO) && defined(CONFIG_JUMP_LABEL) # define HAVE_JUMP_LABEL #endif We can improve this by testing 'asm goto' support in Kconfig, then make JUMP_LABEL depend on CC_HAS_ASM_GOTO. Ugly #ifdef HAVE_JUMP_LABEL will go away, and CONFIG_JUMP_LABEL will match to the real kernel capability. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Diffstat (limited to 'kernel/jump_label.c')
-rw-r--r--kernel/jump_label.c10
1 files changed, 3 insertions, 7 deletions
diff --git a/kernel/jump_label.c b/kernel/jump_label.c
index b28028b08d44..bad96b476eb6 100644
--- a/kernel/jump_label.c
+++ b/kernel/jump_label.c
@@ -18,8 +18,6 @@
#include <linux/cpu.h>
#include <asm/sections.h>
-#ifdef HAVE_JUMP_LABEL
-
/* mutex to protect coming/going of the the jump_label table */
static DEFINE_MUTEX(jump_label_mutex);
@@ -80,13 +78,13 @@ jump_label_sort_entries(struct jump_entry *start, struct jump_entry *stop)
static void jump_label_update(struct static_key *key);
/*
- * There are similar definitions for the !HAVE_JUMP_LABEL case in jump_label.h.
+ * There are similar definitions for the !CONFIG_JUMP_LABEL case in jump_label.h.
* The use of 'atomic_read()' requires atomic.h and its problematic for some
* kernel headers such as kernel.h and others. Since static_key_count() is not
- * used in the branch statements as it is for the !HAVE_JUMP_LABEL case its ok
+ * used in the branch statements as it is for the !CONFIG_JUMP_LABEL case its ok
* to have it be a function here. Similarly, for 'static_key_enable()' and
* 'static_key_disable()', which require bug.h. This should allow jump_label.h
- * to be included from most/all places for HAVE_JUMP_LABEL.
+ * to be included from most/all places for CONFIG_JUMP_LABEL.
*/
int static_key_count(struct static_key *key)
{
@@ -791,5 +789,3 @@ static __init int jump_label_test(void)
}
early_initcall(jump_label_test);
#endif /* STATIC_KEYS_SELFTEST */
-
-#endif /* HAVE_JUMP_LABEL */