[ANNOUNCE] 5.4.109-rt56

[Tom Zanussi]

Hello RT Folks!

I'm pleased to announce the 5.4.109-rt56 stable release.

You can get this release via the git tree at:

  git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-stable-rt.git

  branch: v5.4-rt
  Head SHA1: a84a83ce44cafc96cb9cf419378a713dcdea00ac

Or to build 5.4.109-rt56 directly, the following patches should be applied:

  https://www.kernel.org/pub/linux/kernel/v5.x/linux-5.4.tar.xz

  https://www.kernel.org/pub/linux/kernel/v5.x/patch-5.4.109.xz

  https://www.kernel.org/pub/linux/kernel/projects/rt/5.4/patch-5.4.109-rt56.patch.xz


You can also build from 5.4.109-rt55 by applying the incremental patch:

  https://www.kernel.org/pub/linux/kernel/projects/rt/5.4/incr/patch-5.4.109-rt55-rt56.patch.xz

Enjoy!

   Tom

Changes from v5.4.109-rt55:
---

Sebastian Andrzej Siewior (1):
      mm: slub: Don't resize the location tracking cache on PREEMPT_RT

Tom Zanussi (1):
      Linux 5.4.109-rt56
---
localversion-rt | 2 +-
 mm/slub.c       | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/localversion-rt b/localversion-rt
index 51b05e9abe6f..fdb0f880c7e9 100644
--- a/localversion-rt
+++ b/localversion-rt
@@ -1 +1 @@
--rt55
+-rt56
diff --git a/mm/slub.c b/mm/slub.c
index 1815e28852fe..0d78368d149a 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4647,6 +4647,9 @@ static int alloc_loc_track(struct loc_track *t, unsigned long max, gfp_t flags)
 	struct location *l;
 	int order;
 
+	if (IS_ENABLED(CONFIG_PREEMPT_RT) && flags == GFP_ATOMIC)
+		return 0;
+
 	order = get_order(sizeof(struct location) * max);
 
 	l = (void *)__get_free_pages(flags, order);