Merge tag 'slab-for-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab updates from Vlastimil Babka:

 - SLAB deprecation:

   Following the discussion at LSF/MM 2023 [1] and no objections, the
   SLAB allocator is deprecated by renaming the config option (to make
   its users notice) to CONFIG_SLAB_DEPRECATED with updated help text.
   SLUB should be used instead. Existing defconfigs with CONFIG_SLAB are
   also updated.

 - SLAB_NO_MERGE kmem_cache flag (Jesper Dangaard Brouer):

   There are (very limited) cases where kmem_cache merging is
   undesirable, and existing ways to prevent it are hacky. Introduce a
   new flag to do that cleanly and convert the existing hacky users.
   Btrfs plans to use this for debug kernel builds (that use case is
   always fine), networking for performance reasons (that should be very
   rare).

 - Replace the usage of weak PRNGs (David Keisar Schmidt):

   In addition to using stronger RNGs for the security related features,
   the code is a bit cleaner.

 - Misc code cleanups (SeongJae Parki, Xiongwei Song, Zhen Lei, and
   zhaoxinchao)

Link: https://lwn.net/Articles/932201/ [1]

* tag 'slab-for-6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab:
  mm/slab_common: use SLAB_NO_MERGE instead of negative refcount
  mm/slab: break up RCU readers on SLAB_TYPESAFE_BY_RCU example code
  mm/slab: add a missing semicolon on SLAB_TYPESAFE_BY_RCU example code
  mm/slab_common: reduce an if statement in create_cache()
  mm/slab: introduce kmem_cache flag SLAB_NO_MERGE
  mm/slab: rename CONFIG_SLAB to CONFIG_SLAB_DEPRECATED
  mm/slab: remove HAVE_HARDENED_USERCOPY_ALLOCATOR
  mm/slab_common: Replace invocation of weak PRNG
  mm/slab: Replace invocation of weak PRNG
  slub: Don't read nr_slabs and total_objects directly
  slub: Remove slabs_node() function
  slub: Remove CONFIG_SMP defined check
  slub: Put objects_show() into CONFIG_SLUB_DEBUG enabled block
  slub: Correct the error code when slab_kset is NULL
  mm/slab: correct return values in comment for _kmem_cache_create()

12 files changed, 0 insertions, 12 deletions

diff --git a/arch/m68k/configs/amiga_defconfig b/arch/m68k/configs/amiga_defconfig
index 62fdca7efce4..4383ed851063 100644
--- a/arch/m68k/configs/amiga_defconfig
+++ b/arch/m68k/configs/amiga_defconfig
@@ -41,7 +41,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/apollo_defconfig b/arch/m68k/configs/apollo_defconfig
index 5bfbd0444bb5..ec0f9c9f9562 100644
--- a/arch/m68k/configs/apollo_defconfig
+++ b/arch/m68k/configs/apollo_defconfig
@@ -37,7 +37,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/atari_defconfig b/arch/m68k/configs/atari_defconfig
index 44302f11c9ea..8656ae1f239e 100644
--- a/arch/m68k/configs/atari_defconfig
+++ b/arch/m68k/configs/atari_defconfig
@@ -44,7 +44,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/bvme6000_defconfig b/arch/m68k/configs/bvme6000_defconfig
index f3336f1774ec..496fb6a415ea 100644
--- a/arch/m68k/configs/bvme6000_defconfig
+++ b/arch/m68k/configs/bvme6000_defconfig
@@ -34,7 +34,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/hp300_defconfig b/arch/m68k/configs/hp300_defconfig
index 2d1bbac68066..4add7ab9973b 100644
--- a/arch/m68k/configs/hp300_defconfig
+++ b/arch/m68k/configs/hp300_defconfig
@@ -36,7 +36,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/mac_defconfig b/arch/m68k/configs/mac_defconfig
index b4428dc36102..5845f1f71fd1 100644
--- a/arch/m68k/configs/mac_defconfig
+++ b/arch/m68k/configs/mac_defconfig
@@ -35,7 +35,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/multi_defconfig b/arch/m68k/configs/multi_defconfig
index 4cd9fa4cb10c..bbb251bab81a 100644
--- a/arch/m68k/configs/multi_defconfig
+++ b/arch/m68k/configs/multi_defconfig
@@ -55,7 +55,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/mvme147_defconfig b/arch/m68k/configs/mvme147_defconfig
index 7ee9ad50f0ad..4f9cfc70c66d 100644
--- a/arch/m68k/configs/mvme147_defconfig
+++ b/arch/m68k/configs/mvme147_defconfig
@@ -33,7 +33,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/mvme16x_defconfig b/arch/m68k/configs/mvme16x_defconfig
index 2488893616dc..67c42b4822f0 100644
--- a/arch/m68k/configs/mvme16x_defconfig
+++ b/arch/m68k/configs/mvme16x_defconfig
@@ -34,7 +34,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/q40_defconfig b/arch/m68k/configs/q40_defconfig
index ffc676289f87..85f19515200b 100644
--- a/arch/m68k/configs/q40_defconfig
+++ b/arch/m68k/configs/q40_defconfig
@@ -35,7 +35,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y
diff --git a/arch/m68k/configs/sun3_defconfig b/arch/m68k/configs/sun3_defconfig
index 198179657ce0..b1b15acb5d5f 100644
--- a/arch/m68k/configs/sun3_defconfig
+++ b/arch/m68k/configs/sun3_defconfig
@@ -31,7 +31,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_USERFAULTFD=y
 CONFIG_NET=y
diff --git a/arch/m68k/configs/sun3x_defconfig b/arch/m68k/configs/sun3x_defconfig
index 85364f6178d4..91d66c0f5ab6 100644
--- a/arch/m68k/configs/sun3x_defconfig
+++ b/arch/m68k/configs/sun3x_defconfig
@@ -31,7 +31,6 @@ CONFIG_MQ_IOSCHED_KYBER=m
 CONFIG_IOSCHED_BFQ=m
 # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
 CONFIG_BINFMT_MISC=m
-CONFIG_SLAB=y
 # CONFIG_COMPACTION is not set
 CONFIG_DMAPOOL_TEST=m
 CONFIG_USERFAULTFD=y