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Miklos Szeredi 9440600419 BACKPORT: fuse: fix warning in tree_insert() and clean up writepage insertion 
fuse_writepages_fill() calls tree_insert() with ap->num_pages = 0 which
triggers the following warning:

 WARNING: CPU: 1 PID: 17211 at fs/fuse/file.c:1728 tree_insert+0xab/0xc0 [fuse]
 RIP: 0010:tree_insert+0xab/0xc0 [fuse]
 Call Trace:
  fuse_writepages_fill+0x5da/0x6a0 [fuse]
  write_cache_pages+0x171/0x470
  fuse_writepages+0x8a/0x100 [fuse]
  do_writepages+0x43/0xe0

Fix up the warning and clean up the code around rb-tree insertion:

 - Rename tree_insert() to fuse_insert_writeback() and make it return the
   conflicting entry in case of failure

 - Re-add tree_insert() as a wrapper around fuse_insert_writeback()

 - Rename fuse_writepage_in_flight() to fuse_writepage_add() and reverse
   the meaning of the return value to mean

    + "true" in case the writepage entry was successfully added

    + "false" in case it was in-fligt queued on an existing writepage
       entry's auxiliary list or the existing writepage entry's temporary
       page updated

   Switch from fuse_find_writeback() + tree_insert() to
   fuse_insert_writeback()

 - Move setting orig_pages to before inserting/updating the entry; this may
   result in the orig_pages value being discarded later in case of an
   in-flight request

 - In case of a new writepage entry use fuse_writepage_add()
   unconditionally, only set data->wpa if the entry was added.

Fixes: 6b2fb79963fb ("fuse: optimize writepages search")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Original-path-by: Vasily Averin <vvs@virtuozzo.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com>
Change-Id: I2ae5f55cc95ce93a5a6892baca52c9cfd4a85503
2022-11-12 11:22:15 +00:00
android ANDROID: fix up abi issue with struct snd_pcm_runtime 2022-05-18 14:50:41 +02:00
arch BACKPORT: arm64: mm: apply r/o permissions of VM areas to its linear alias as well 2022-11-12 11:21:44 +00:00
block UPSTREAM: block: make function __bio_integrity_free() static 2022-11-12 11:20:51 +00:00
certs Merge remote-tracking branch 'aosp/android-4.19-stable' into android12-base 2022-07-09 10:34:17 +05:30
crypto lib/lzo: separate lzo-rle from lzo 2022-11-12 11:19:24 +00:00
Documentation BACKPORT: linkage: Introduce new macros for assembler symbols 2022-11-12 11:21:32 +00:00
drivers PM / devfreq: Make max_freq node read only 2022-11-12 11:21:40 +00:00
firmware Fix built-in early-load Intel microcode alignment 2020-01-23 08:21:29 +01:00
fs BACKPORT: fuse: fix warning in tree_insert() and clean up writepage insertion 2022-11-12 11:22:15 +00:00
include ANDROID: fuse/passthrough: API V2 with __u32 open argument 2022-11-12 11:22:13 +00:00
init Revert "psi: Introduce ftrace events" 2022-11-12 11:20:31 +00:00
ipc vm_ops: rename .split() callback to .may_split() 2022-11-12 11:21:26 +00:00
kernel PM / sleep: Skip OOM killer toggles when kernel is compiled for Android 2022-11-12 11:21:40 +00:00
lib BACKPORT: lz4: fix LZ4_decompress_safe_partial read out of bound 2022-11-12 11:21:39 +00:00
LICENSES LICENSES: Add ISC license text 2019-01-10 17:22:01 +02:00
mm BACKPORT: ANDROID: cma: allow to use CMA in swap-in path 2022-11-12 11:21:48 +00:00
net BACKPORT: UPSTREAM: cfg80211: separate get channel number from ies 2022-11-12 11:20:51 +00:00
samples This is the 4.19.218 stable release 2021-11-26 15:19:33 +01:00
scripts BACKPORT: cert host tools: Stop complaining about deprecated OpenSSL functions 2022-11-12 11:21:29 +00:00
security selinux: Allow audit to be disabled 2022-11-12 11:19:22 +00:00
sound sound: soc: support host-less 24bit formats 2022-11-12 11:19:17 +00:00
techpack techpack: audio: promote send_tfa_cal_apr out of DEBUG_FS 2022-11-12 11:19:57 +00:00
tools This is the 4.19.264 stable release 2022-11-07 09:38:03 +01:00
usr initramfs: restore default compression behavior 2020-04-13 10:44:59 +02:00
virt mm: treewide: remove unused address argument from pte_alloc functions 2022-11-12 11:21:18 +00:00
.clang-format clang-format: Set IndentWrappedFunctionNames false 2018-08-01 18:38:51 +02:00
.cocciconfig
.get_maintainer.ignore
.gitattributes .gitattributes: set git diff driver for C source code files 2016-10-07 18:46:30 -07:00
.gitignore .gitignore: remove dts vendor 2022-11-12 11:19:05 +00:00
.gitmodules mkdtimg: Bundle upstream python rewrite as submodule 2022-11-12 11:19:02 +00:00
.mailmap libnvdimm-for-4.19_misc 2018-08-25 18:13:10 -07:00
AndroidKernel.mk AndroidKernel: add TARGET_PREBUILT_INT_KERNEL_IMAGE 2019-08-02 20:31:09 +08:00
build.config.aarch64 ANDROID: enable LLVM_IAS=1 for clang's integrated assembler for aarch64 2021-01-11 17:34:43 -08:00
build.config.allmodconfig ANDROID: Different fix for KABI breakage in 4.19.209 in struct sock 2021-10-11 19:44:01 +00:00
build.config.allmodconfig.aarch64 ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.allmodconfig.arm ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.allmodconfig.x86_64 ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.arm Revert "ANDROID: Kbuild, LLVMLinux: allow overriding clang target triple" 2020-11-10 11:47:24 -08:00
build.config.common ANDROID: clang: update to 12.0.5 2021-04-19 19:40:51 +00:00
build.config.gki ANDROID: gki: Removed cf modules from gki_defconfig 2020-01-31 16:23:38 -08:00
build.config.gki_kasan ANDROID: build_config: drop CONFIG_KASAN_PANIC_ON_WARN 2021-02-15 18:29:34 +00:00
build.config.gki_kasan.aarch64 ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.gki_kasan.x86_64 ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.gki_kprobes ANDROID: Adding kprobes build configs for Cuttlefish 2021-02-28 05:19:39 +00:00
build.config.gki_kprobes.aarch64 ANDROID: Adding kprobes build configs for Cuttlefish 2021-02-28 05:19:39 +00:00
build.config.gki_kprobes.x86_64 ANDROID: Adding kprobes build configs for Cuttlefish 2021-02-28 05:19:39 +00:00
build.config.gki-debug.aarch64 ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.gki-debug.x86_64 ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.gki.aarch64 ANDROID: GKI: prevent removal of monitored symbols 2020-09-29 11:48:43 +01:00
build.config.gki.x86_64 ANDROID: drop KERNEL_DIR setting in build.config.common 2020-09-25 15:14:51 +08:00
build.config.goldfish.arm ANDROID: build.config: enforce trace_printk check 2018-08-28 17:10:42 +05:30
build.config.goldfish.arm64 ANDROID: build.config: enforce trace_printk check 2018-08-28 17:10:42 +05:30
build.config.goldfish.mips ANDROID: build.config: enforce trace_printk check 2018-08-28 17:10:42 +05:30
build.config.goldfish.mips64 ANDROID: build.config: enforce trace_printk check 2018-08-28 17:10:42 +05:30
build.config.goldfish.x86 ANDROID: build.config: enforce trace_printk check 2018-08-28 17:10:42 +05:30
build.config.goldfish.x86_64 ANDROID: build.config: enforce trace_printk check 2018-08-28 17:10:42 +05:30
build.config.x86_64 Revert "Revert "ANDROID: enable LLVM_IAS=1 for clang's integrated assembler for x86_64"" 2021-02-03 13:34:51 -08:00
COPYING COPYING: use the new text with points to the license files 2018-03-23 12:41:45 -06:00
CREDITS 9p: remove Ron Minnich from MAINTAINERS 2018-08-17 16:20:26 -07:00
gen_headers_arm64.bp net: Port samsung MPTCP modifications from SM-N986B 2022-11-12 11:19:58 +00:00
gen_headers_arm.bp net: Port samsung MPTCP modifications from SM-N986B 2022-11-12 11:19:58 +00:00
Kbuild Kbuild updates for v4.15 2017-11-17 17:45:29 -08:00
Kconfig kconfig: move the "Executable file formats" menu to fs/Kconfig.binfmt 2018-08-02 08:06:55 +09:00
kernel_headers.py Change the subprocess argument to fix the build issue 2021-06-28 16:47:30 +05:30
MAINTAINERS Merge remote-tracking branch 'aosp/android-4.19-stable' into android12-base 2022-07-09 10:34:17 +05:30
Makefile techpack: Build display 2022-11-12 11:19:12 +00:00
OWNERS ANDROID: Add OWNERS files referring to the respective android-mainline OWNERS 2021-04-03 14:09:44 +00:00
README Docs: Added a pointer to the formatted docs to README 2018-03-21 09:02:53 -06:00
verity_dev_keys.x509 x86_64_cuttlefish_defconfig: enable verity cert 2018-08-28 17:15:17 +05:30

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.