Ira Weiny defdaff15a checkpatch: add kmap and kmap_atomic to the deprecated list ... kmap() and kmap_atomic() are being deprecated in favor of kmap_local_page(). There are two main problems with kmap(): (1) It comes with an overhead as mapping space is restricted and protected by a global lock for synchronization and (2) it also requires global TLB invalidation when the kmap's pool wraps and it might block when the mapping space is fully utilized until a slot becomes available. kmap_local_page() is safe from any context and is therefore redundant with kmap_atomic() with the exception of any pagefault or preemption disable requirements. However, using kmap_atomic() for these side effects makes the code less clear. So any requirement for pagefault or preemption disable should be made explicitly. With kmap_local_page() the mappings are per thread, CPU local, can take page faults, and can be called from any context (including interrupts). It is faster than kmap() in kernels with HIGHMEM enabled. Furthermore, the tasks can be preempted and, when they are scheduled to run again, the kernel virtual addresses are restored. Link: https://lkml.kernel.org/r/20220813220034.806698-1-ira.weiny@intel.com Signed-off-by: Ira Weiny <ira.weiny@intel.com> Suggested-by: Thomas Gleixner <tglx@linutronix.de> Suggested-by: Fabio M. De Francesco <fmdefrancesco@gmail.com> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Cc: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>		2022-09-11 21:55:06 -07:00
..
atomic	locking/atomic: Add generic try_cmpxchg64 support	2022-05-18 00:08:27 +02:00
basic	randstruct: Move seed generation into scripts/basic/	2022-05-08 01:33:07 -07:00
clang-tools	scripts/clang-tools: Remove DeprecatedOrUnsafeBufferHandling check	2022-08-21 02:47:49 +09:00
coccinelle	update Coccinelle URL	2022-08-07 21:30:36 +02:00
dtc	h8300: remove stale bindings and symlink	2022-05-20 22:40:56 +02:00
dummy-tools	kbuild: dummy-tools: pretend we understand __LONG_DOUBLE_128__	2022-08-21 02:47:48 +09:00
gcc-plugins	treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_385.RULE	2022-06-10 14:51:36 +02:00
gdb	Updates to various subsystems which I help look after. lib, ocfs2,	2022-08-07 10:03:24 -07:00
genksyms	genksyms: adjust the output format to modpost	2022-05-24 16:33:20 +09:00
kconfig	kconfig: Qt5: tell the user which packages are required	2022-07-27 21:18:00 +09:00
ksymoops
mod	modpost: fix module versioning when a symbol lacks valid CRC	2022-08-21 02:47:36 +09:00
package	kbuild: rpm-pkg: fix build error when _arch is undefined	2022-07-27 21:18:00 +09:00
selinux	selinux: declare data arrays const	2022-05-03 15:53:49 -04:00
tracing	scripts/tracing: Fix typo 'the the' in comment	2022-08-02 15:17:00 -04:00
.gitignore
adjust_autoksyms.sh	kbuild: split the second line of *.mod into *.usyms	2022-05-08 03:16:59 +09:00
as-version.sh
asn1_compiler.c
bin2c.c
bloat-o-meter	scripts/bloat-o-meter: add -p argument	2022-07-17 17:31:40 -07:00
bootgraph.pl
bpf_doc.py	bpf, docs: Use SPDX license identifier in bpf_doc.py	2022-07-22 00:28:14 +02:00
cc-can-link.sh
cc-version.sh
check-local-export	scripts/check-local-export: avoid 'wait $!' for process substitution	2022-06-10 03:47:13 +09:00
check-sysctl-docs
check_extable.sh
checkdeclares.pl
checkincludes.pl
checkkconfigsymbols.py
checkpatch.pl	checkpatch: add kmap and kmap_atomic to the deprecated list	2022-09-11 21:55:06 -07:00
checkstack.pl	checkstack: add riscv support for scripts/checkstack.pl	2022-07-27 21:18:00 +09:00
checksyscalls.sh	checksyscalls: ignore -Wunused-macros	2022-05-08 03:16:59 +09:00
checkversion.pl
cleanfile
cleanpatch
coccicheck
config
const_structs.checkpatch
decode_stacktrace.sh	scripts/decode_stacktrace.sh: support old bash version	2022-04-29 14:37:57 -07:00
decodecode	scripts/decodecode: improve faulting line determination	2022-09-11 21:55:05 -07:00
depmod.sh
dev-needs.sh
diffconfig
documentation-file-ref-check
export_report.pl
extract-ikconfig
extract-module-sig.pl
extract-sys-certs.pl
extract-vmlinux
extract_xc3028.pl
faddr2line	scripts/faddr2line: Add CONFIG_DEBUG_INFO check	2022-08-02 22:08:17 +02:00
file-size.sh
find-unused-docs.sh
gcc-ld
gcc-x86_32-has-stack-protector.sh
gcc-x86_64-has-stack-protector.sh
gen-randstruct-seed.sh	randstruct: Move seed generation into scripts/basic/	2022-05-08 01:33:07 -07:00
gen_autoksyms.sh	kbuild: Ignore __this_module in gen_autoksyms.sh	2022-06-26 06:15:05 +09:00
gen_ksymdeps.sh
generate_initcall_order.pl
get_abi.pl	scripts/get_abi: Fix wrong script file name in the help message	2022-04-24 10:38:44 +02:00
get_dvb_firmware
get_feat.pl	scripts: get_feat.pl: use /usr/bin/env to find perl	2022-06-30 12:22:17 -06:00
get_maintainer.pl	get_maintainer: Honor mailmap for in file emails	2022-04-29 14:38:00 -07:00
gfp-translate
headerdep.pl
headers_install.sh	scripts: headers_install.sh: Update config leak ignore entries	2022-07-27 21:18:00 +09:00
insert-sys-cert.c
install.sh	kbuild: factor out the common installation code into scripts/install.sh	2022-05-11 21:45:53 +09:00
jobserver-exec
kallsyms.c	scripts/kallsyms: update usage message of the kallsyms program	2022-05-27 15:51:48 +09:00
Kbuild.include	kbuild: add cmd_and_savecmd macro	2022-06-01 23:07:29 +09:00
Kconfig.include	kbuild: set EXIT trap before creating temporary directory	2022-08-03 22:56:38 +09:00
kernel-doc	scripts: kernel-doc: Always increment warnings counter	2022-06-13 11:07:45 -06:00
ld-version.sh
leaking_addresses.pl
Lindent
link-vmlinux.sh	kbuild: factor out the common objtool arguments	2022-06-05 06:20:57 +09:00
Makefile	kbuild: Allow kernel installation packaging to override pkg-config	2022-04-05 17:03:31 +09:00
Makefile.asm-generic
Makefile.build	kbuild: remove sed command from cmd_ar_builtin	2022-07-27 21:17:59 +09:00
Makefile.clang	um: Allow builds with Clang	2022-03-21 08:13:03 -07:00
Makefile.clean	kbuild: drop $(objtree)/ prefix support for clean-files	2022-05-08 03:17:00 +09:00
Makefile.compiler	kbuild: set EXIT trap before creating temporary directory	2022-08-03 22:56:38 +09:00
Makefile.debug
Makefile.dtbinst
Makefile.extrawarn	scripts/Makefile.extrawarn: Do not disable clang's -Wformat-zero-length	2022-08-21 02:47:48 +09:00
Makefile.gcc-plugins	gcc-plugins: Undefine LATENT_ENTROPY_PLUGIN when plugin disabled for a file	2022-08-16 12:25:53 -07:00
Makefile.headersinst
Makefile.host
Makefile.kasan
Makefile.kcov
Makefile.kcsan
Makefile.lib	x86/retbleed: Add fine grained Kconfig knobs	2022-06-29 17:43:41 +02:00
Makefile.modfinal	kbuild: do not create *.prelink.o for Clang LTO or IBT	2022-05-29 18:39:35 +09:00
Makefile.modinst	kbuild: error out if $(INSTALL_MOD_PATH) contains % or :	2022-07-27 21:18:00 +09:00
Makefile.modpost	kbuild: do not create *.prelink.o for Clang LTO or IBT	2022-05-29 18:39:35 +09:00
Makefile.package	kbuild: rpm-pkg: pass 'linux' to --target option of rpmbuild	2022-07-27 21:18:00 +09:00
Makefile.randstruct	randstruct: Enable Clang support	2022-05-08 01:33:07 -07:00
Makefile.ubsan
Makefile.userprogs
Makefile.vmlinux	kbuild: link symbol CRCs at final link, removing CONFIG_MODULE_REL_CRCS	2022-05-24 16:33:20 +09:00
Makefile.vmlinux_o	x86/retbleed: Add fine grained Kconfig knobs	2022-06-29 17:43:41 +02:00
makelst
markup_oops.pl
min-tool-version.sh	scripts/min-tool-version.sh: raise minimum clang version to 14.0.0 for s390	2022-05-17 15:16:29 +02:00
mkcompile_h	sched/preempt: Tell about PREEMPT_DYNAMIC on kernel headers	2022-03-11 15:36:35 +01:00
mksysmap
mkuboot.sh
module.lds.S	modules: Ensure natural alignment for .altinstructions and __bug_table sections	2022-07-11 10:49:14 -07:00
modules-check.sh
nsdeps	scripts/nsdeps: adjust to the format change of *.mod files	2022-06-08 20:14:13 +09:00
objdiff	kbuild: clean .tmp_* pattern by make clean	2022-06-05 06:20:57 +09:00
objdump-func	scripts: Create objdump-func helper script	2022-05-12 10:08:43 -07:00
pahole-flags.sh	scripts/pahole-flags.sh: Parse DWARF and generate BTF with multithreading.	2022-02-22 14:32:44 -08:00
pahole-version.sh	kbuild: Add CONFIG_PAHOLE_VERSION	2022-02-02 11:19:33 +01:00
parse-maintainers.pl
patch-kernel
profile2linkerlist.pl
prune-kernel	scripts/prune-kernel: Use kernel-install if available	2022-05-11 21:46:38 +09:00
recordmcount.c
recordmcount.h
recordmcount.pl	nds32: Remove the architecture	2022-03-07 13:54:59 +01:00
remove-stale-files	RISC-V Patches for the 5.20 Merge Window, Part 2	2022-08-12 18:39:43 -07:00
setlocalversion
show_delta
sign-file.c	sign-file: Fix confusing error messages	2022-08-03 23:56:20 +03:00
sorttable.c	LoongArch: Add ELF-related definitions	2022-06-03 20:09:27 +08:00
sorttable.h
spdxcheck-test.sh	docs: move Linux logo into a new images folder	2022-06-01 09:32:45 -06:00
spdxcheck.py	scripts/spdxcheck: Put excluded files and directories into a separate file	2022-05-18 15:34:33 +02:00
spdxexclude	scripts/spdxcheck: Exclude top-level README	2022-05-18 15:35:42 +02:00
spelling.txt	scripts/spelling.txt: add more spellings to spelling.txt	2022-03-22 15:57:00 -07:00
sphinx-pre-install	scripts: sphinx-pre-install: place a warning for Sphinx >= 3.0	2022-07-07 12:47:34 -06:00
split-man.pl
stackdelta
stackusage
subarch.include	LoongArch: Add build infrastructure	2022-06-03 20:09:27 +08:00
syscallhdr.sh
syscallnr.sh
syscalltbl.sh
tags.sh	scripts/tags.sh: Include tools directory in tags generation	2022-07-01 10:32:30 +02:00
test_fortify.sh	fortify: Update compile-time tests for Clang 14	2022-02-13 16:50:06 -08:00
tools-support-relr.sh
unifdef.c
ver_linux
xen-hypercalls.sh
xz_wrap.sh