[tip: locking/core] jump_label: remove workaround for old compilers in initializations

[tip-bot2 for Thomas Weißschuh]

The following commit has been merged into the locking/core branch of tip:

Commit-ID:     acb38872d4cbec5b6825345d9d757e21d2d9d953
Gitweb:        https://git.kernel.org/tip/acb38872d4cbec5b6825345d9d757e21d2d9d953
Author:        Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx>
AuthorDate:    Fri, 13 Mar 2026 09:22:19 +01:00
Committer:     Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Mon, 16 Mar 2026 13:16:49 +01:00

jump_label: remove workaround for old compilers in initializations

The extra braces for the initialization of the anonymous union members
were added in commit cd8d860dcce9 ("jump_label: Fix anonymous union
initialization") to compensate for limitations in gcc < 4.6.

Versions of gcc this old are not supported anymore,
so drop the workaround.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://patch.msgid.link/20260313-jump_label-cleanup-v2-2-35d3c0bde549@xxxxxxxxxxxxx
---
 include/linux/jump_label.h | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/include/linux/jump_label.h b/include/linux/jump_label.h
index e494b36..b9c7b0e 100644
--- a/include/linux/jump_label.h
+++ b/include/linux/jump_label.h
@@ -87,13 +87,6 @@ struct static_key {
 	atomic_t enabled;
 #ifdef CONFIG_JUMP_LABEL
 /*
- * Note:
- *   To make anonymous unions work with old compilers, the static
- *   initialization of them requires brackets. This creates a dependency
- *   on the order of the struct with the initializers. If any fields
- *   are added, STATIC_KEY_INIT_TRUE and STATIC_KEY_INIT_FALSE may need
- *   to be modified.
- *
  * bit 0 => 1 if key is initially true
  *	    0 if initially false
  * bit 1 => 1 if points to struct static_key_mod
@@ -240,10 +233,10 @@ extern enum jump_label_type jump_label_init_type(struct jump_entry *entry);
 
 #define STATIC_KEY_INIT_TRUE					\
 	{ .enabled = ATOMIC_INIT(1),				\
-	  { .type = JUMP_TYPE_TRUE } }
+	  .type = JUMP_TYPE_TRUE }
 #define STATIC_KEY_INIT_FALSE					\
 	{ .enabled = ATOMIC_INIT(0),				\
-	  { .type = JUMP_TYPE_FALSE } }
+	  .type = JUMP_TYPE_FALSE }
 
 #else  /* !CONFIG_JUMP_LABEL */