Matthew Wilcox 58d6ea3085 xarray: Add XArray unconditional store operations ... xa_store() differs from radix_tree_insert() in that it will overwrite an existing element in the array rather than returning an error. This is the behaviour which most users want, and those that want more complex behaviour generally want to use the xas family of routines anyway. For memory allocation, xa_store() will first attempt to request memory from the slab allocator; if memory is not immediately available, it will drop the xa_lock and allocate memory, keeping a pointer in the xa_state. It does not use the per-CPU cache, although those will continue to exist until all radix tree users are converted to the xarray. This patch also includes xa_erase() and __xa_erase() for a streamlined way to store NULL. Since there is no need to allocate memory in order to store a NULL in the XArray, we do not need to trouble the user with deciding what memory allocation flags to use. Signed-off-by: Matthew Wilcox <willy@infradead.org>		2018-10-21 10:45:57 -04:00
..
sched	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
unaligned	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
atomic.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
bitmap.h	xarray: Add XArray unconditional store operations	2018-10-21 10:45:57 -04:00
bitops.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
bug.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
compiler-gcc.h	tools: bpf: make use of reallocarray	2018-07-11 22:13:34 +02:00
compiler.h	tools headers: Restore READ_ONCE() C++ compatibility	2018-04-12 09:30:09 -03:00
coresight-pmu.h	coresight: Move to SPDX identifier	2018-04-19 12:29:41 -03:00
debug_locks.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
delay.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
err.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
export.h	tools: Restore export.h	2015-08-25 09:44:22 +02:00
filter.h	bpf: test case for map pointer poison with calls/branches	2018-06-03 07:42:06 -07:00
ftrace.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
gfp.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
hardirq.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
hash.h	tools/headers: Synchronize kernel ABI headers	2017-11-04 09:27:46 +01:00
hashtable.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
interrupt.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
irqflags.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
jhash.h	tools/lib/lockdep: Fix compilation for 4.11	2017-06-05 09:28:09 +02:00
kallsyms.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kern_levels.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
kernel.h	xarray: Add XArray load operation	2018-10-21 10:45:57 -04:00
linkage.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
list.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
lockdep.h	tools/lib/lockdep: Add dummy task_struct state member	2018-09-10 13:48:24 +02:00
log2.h	tools include: Include missing headers for fls() and types in linux/log2.h	2017-04-19 13:01:49 -03:00
module.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
mutex.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
nmi.h	tools/lib/lockdep: Add empty nmi.h	2018-09-10 13:48:23 +02:00
overflow.h	tools: bpf: make use of reallocarray	2018-07-11 22:13:34 +02:00
poison.h	Merge branch 'linus' into perf/core, to fix conflicts	2017-11-07 10:30:18 +01:00
proc_fs.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
rbtree.h	tools: Move rbtree.h from tools/perf/	2015-07-05 22:54:01 -03:00
rbtree_augmented.h	tools: Copy rbtree_augmented.h from the kernel	2015-07-05 22:59:05 -03:00
rcu.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
refcount.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
seq_file.h	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
spinlock.h	xarray: Add XArray unconditional store operations	2018-10-21 10:45:57 -04:00
stacktrace.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
string.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
stringify.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
time64.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
types.h	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00