Merge branches 'expcb.2026.07.24a', 'misc.2026.07.30a', 'rcu-tasks.2026.07.30a', 'srcu.2026.08.11a' and 'torture.2026.08.14a' into HEADgrafted

Changes:

Make expedited grace periods expedite normal RCU callbacks

Miscellaneous fixes:
 * Improve diagnostic output with character task states.
 * Mark accesses to inform KCSAN of concurrency design.
 * Move from kmalloc() to kmalloc_obj().
 * Documentation updates.
 * Improve handling of RCU deferred quiescent states.
 * Clean up unused function arguments and structure fields.
 * Reduce show_rcu_gp_kthreads() stack space.

Tasks RCU updates:
 * Clean up after SRCU re-implementation of Tasks Trace RCU.
 * Mark accesses to inform KCSAN of concurrency design.
 * Add ->lazy_timer status to diagnostic output.
 * Remove an unnecessary memory barrier.
 * Fix a data race, courtesy of KCSAN.
 * Documentation updates.
 * Convert cond_resched_tasks_rcu_qs() from macro to static inline
   function.

SRCU updates:
 * Add Rust helpers for SRCU.
 * Avoid losing queued work at cleanup_srcu_struct() time.

Torture-test updates:
 * Preparation work for immediate RCU priority deboosting.
 * Test RCU readers from real interrupt handlers (as opposed to softirq).
 * Simplify code through use of cpumask_next_wrap().
 * Improve diagnostic output with character task states.
 * Add rcutorture.nwriters parameter to allow lightweight stall testing,
   and rcutorture.stall_only to make doing so easier.
 * Test an RCU Tasks Trace grace period implying an RCU grace period.
 * Make RCU Tasks Trace torturing track reader batches.
 * Fix a data race, courtesy of KCSAN.
 * Plug a shuffle_tmp_mask memory leak on kthread spawn failure.

1 files changed, 131 insertions, 0 deletions

diff --git a/fs/Makefile b/fs/Makefile
new file mode 100644
index 000000000..89a8a9d20
--- /dev/null
+++ b/fs/Makefile
@@ -0,0 +1,131 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux filesystems.
+#
+# 14 Sep 2000, Christoph Hellwig <hch@infradead.org>
+# Rewritten to use lists instead of if-statements.
+# 
+
+
+obj-y :=	open.o read_write.o file_table.o super.o \
+		char_dev.o stat.o exec.o pipe.o namei.o fcntl.o \
+		ioctl.o readdir.o select.o dcache.o inode.o \
+		attr.o bad_inode.o file.o filesystems.o namespace.o \
+		seq_file.o xattr.o libfs.o fs-writeback.o \
+		pnode.o splice.o sync.o utimes.o d_path.o \
+		stack.o fs_struct.o statfs.o fs_pin.o nsfs.o \
+		fs_dirent.o fs_context.o fs_parser.o fsopen.o init.o \
+		kernel_read_file.o mnt_idmapping.o remap_range.o pidfs.o \
+		file_attr.o fserror.o nullfs.o
+
+obj-$(CONFIG_BUFFER_HEAD)	+= buffer.o mpage.o
+obj-$(CONFIG_PROC_FS)		+= proc_namespace.o
+obj-$(CONFIG_LEGACY_DIRECT_IO)	+= direct-io.o
+obj-y				+= notify/
+obj-$(CONFIG_EPOLL)		+= eventpoll.o
+obj-y				+= anon_inodes.o
+obj-$(CONFIG_SIGNALFD)		+= signalfd.o
+obj-$(CONFIG_TIMERFD)		+= timerfd.o
+obj-$(CONFIG_EVENTFD)		+= eventfd.o
+obj-$(CONFIG_AIO)               += aio.o
+obj-$(CONFIG_FS_DAX)		+= dax.o
+obj-$(CONFIG_FS_ENCRYPTION)	+= crypto/
+obj-$(CONFIG_FS_VERITY)		+= verity/
+obj-$(CONFIG_FILE_LOCKING)      += locks.o
+obj-$(CONFIG_BINFMT_MISC)	+= binfmt_misc.o
+obj-$(CONFIG_BINFMT_SCRIPT)	+= binfmt_script.o
+obj-$(CONFIG_BINFMT_ELF)	+= binfmt_elf.o
+obj-$(CONFIG_COMPAT_BINFMT_ELF)	+= compat_binfmt_elf.o
+obj-$(CONFIG_BINFMT_ELF_FDPIC)	+= binfmt_elf_fdpic.o
+obj-$(CONFIG_BINFMT_FLAT)	+= binfmt_flat.o
+
+obj-$(CONFIG_FS_STACK)		+= backing-file.o
+obj-$(CONFIG_FS_MBCACHE)	+= mbcache.o
+obj-$(CONFIG_FS_POSIX_ACL)	+= posix_acl.o
+obj-$(CONFIG_NFS_COMMON)	+= nfs_common/
+obj-$(CONFIG_COREDUMP)		+= coredump.o
+obj-$(CONFIG_SYSCTL)		+= drop_caches.o sysctls.o
+
+obj-$(CONFIG_FHANDLE)		+= fhandle.o
+obj-y				+= iomap/
+
+obj-y				+= quota/
+
+obj-$(CONFIG_PROC_FS)		+= proc/
+obj-$(CONFIG_KERNFS)		+= kernfs/
+obj-$(CONFIG_SYSFS)		+= sysfs/
+obj-$(CONFIG_CONFIGFS_FS)	+= configfs/
+obj-y				+= devpts/
+
+obj-$(CONFIG_DLM)		+= dlm/
+ 
+# Do not add any filesystems before this line
+obj-$(CONFIG_NETFS_SUPPORT)	+= netfs/
+obj-$(CONFIG_EXT4_FS)		+= ext4/
+# We place ext4 before ext2 so that clean ext3 root fs's do NOT mount using the
+# ext2 driver, which doesn't know about journalling!  Explicitly request ext2
+# by giving the rootfstype= parameter.
+obj-$(CONFIG_EXT2_FS)		+= ext2/
+obj-$(CONFIG_JBD2)		+= jbd2/
+obj-$(CONFIG_CRAMFS)		+= cramfs/
+obj-$(CONFIG_SQUASHFS)		+= squashfs/
+obj-y				+= ramfs/
+obj-$(CONFIG_HUGETLBFS)		+= hugetlbfs/
+obj-$(CONFIG_CODA_FS)		+= coda/
+obj-$(CONFIG_MINIX_FS)		+= minix/
+obj-$(CONFIG_FAT_FS)		+= fat/
+obj-$(CONFIG_EXFAT_FS)		+= exfat/
+obj-$(CONFIG_BFS_FS)		+= bfs/
+obj-$(CONFIG_ISO9660_FS)	+= isofs/
+obj-$(CONFIG_HFSPLUS_FS)	+= hfsplus/ # Before hfs to find wrapped HFS+
+obj-$(CONFIG_HFS_FS)		+= hfs/
+obj-$(CONFIG_ECRYPT_FS)		+= ecryptfs/
+obj-$(CONFIG_VXFS_FS)		+= freevxfs/
+obj-$(CONFIG_NFS_FS)		+= nfs/
+obj-$(CONFIG_EXPORTFS)		+= exportfs/
+obj-$(CONFIG_NFSD)		+= nfsd/
+obj-$(CONFIG_LOCKD)		+= lockd/
+obj-$(CONFIG_NLS)		+= nls/
+obj-y				+= unicode/
+obj-$(CONFIG_SMBFS)		+= smb/
+obj-$(CONFIG_HPFS_FS)		+= hpfs/
+obj-$(CONFIG_NTFS_FS)		+= ntfs/
+obj-$(CONFIG_NTFS3_FS)		+= ntfs3/
+obj-$(CONFIG_UFS_FS)		+= ufs/
+obj-$(CONFIG_EFS_FS)		+= efs/
+obj-$(CONFIG_JFFS2_FS)		+= jffs2/
+obj-$(CONFIG_UBIFS_FS)		+= ubifs/
+obj-$(CONFIG_AFFS_FS)		+= affs/
+obj-$(CONFIG_ROMFS_FS)		+= romfs/
+obj-$(CONFIG_QNX4FS_FS)		+= qnx4/
+obj-$(CONFIG_QNX6FS_FS)		+= qnx6/
+obj-$(CONFIG_AUTOFS_FS)		+= autofs/
+obj-$(CONFIG_ADFS_FS)		+= adfs/
+obj-$(CONFIG_FUSE_FS)		+= fuse/
+obj-$(CONFIG_OVERLAY_FS)	+= overlayfs/
+obj-$(CONFIG_ORANGEFS_FS)       += orangefs/
+obj-$(CONFIG_UDF_FS)		+= udf/
+obj-$(CONFIG_SUN_OPENPROMFS)	+= openpromfs/
+obj-$(CONFIG_OMFS_FS)		+= omfs/
+obj-$(CONFIG_JFS_FS)		+= jfs/
+obj-$(CONFIG_XFS_FS)		+= xfs/
+obj-$(CONFIG_9P_FS)		+= 9p/
+obj-$(CONFIG_AFS_FS)		+= afs/
+obj-$(CONFIG_NILFS2_FS)		+= nilfs2/
+obj-$(CONFIG_BEFS_FS)		+= befs/
+obj-y				+= hostfs/
+obj-$(CONFIG_CACHEFILES)	+= cachefiles/
+obj-$(CONFIG_DEBUG_FS)		+= debugfs/
+obj-$(CONFIG_TRACING)		+= tracefs/
+obj-$(CONFIG_OCFS2_FS)		+= ocfs2/
+obj-$(CONFIG_BTRFS_FS)		+= btrfs/
+obj-$(CONFIG_GFS2_FS)           += gfs2/
+obj-$(CONFIG_F2FS_FS)		+= f2fs/
+obj-$(CONFIG_CEPH_FS)		+= ceph/
+obj-$(CONFIG_PSTORE)		+= pstore/
+obj-$(CONFIG_EFIVAR_FS)		+= efivarfs/
+obj-$(CONFIG_EROFS_FS)		+= erofs/
+obj-$(CONFIG_VBOXSF_FS)		+= vboxsf/
+obj-$(CONFIG_ZONEFS_FS)		+= zonefs/
+obj-$(CONFIG_BPF_LSM)		+= bpf_fs_kfuncs.o
+obj-$(CONFIG_RESCTRL_FS)	+= resctrl/