linux/fs/ecryptfs
Fabio M. De Francesco c3c6833ea8 fs/ecryptfs: Use kmap_local_page() in ecryptfs_write()
kmap_atomic() is deprecated in favor of kmap_local_page().

Therefore, replace kmap_atomic() with kmap_local_page() in
ecryptfs_write().

kmap_atomic() is implemented like kmap_local_page() which also disables
page-faults and preemption (the latter only for !PREEMPT_RT kernels).

The code within the mapping/un-mapping in ecryptfs_write() does not
depend on the above-mentioned side effects so that a mere replacement of
the old API with the new one is all that is required (i.e., there is no
need to explicitly call pagefault_disable() and/or preempt_disable()).

Tested in a QEMU/KVM x86_32 VM, 6GB RAM, booting a kernel with
HIGHMEM64GB enabled.

Suggested-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: "Fabio M. De Francesco" <fmdefrancesco@gmail.com>
Message-Id: <20230426172223.8896-3-fmdefrancesco@gmail.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>
2023-07-10 14:36:10 +02:00
..
crypto.c fs/ecryptfs: Replace kmap() with kmap_local_page() 2023-07-10 14:36:10 +02:00
debug.c ecryptfs: debug: Demote a couple of kernel-doc abuses 2021-04-19 04:42:13 +00:00
dentry.c ecryptfs: dentry: File headers are not good candidates for kernel-doc 2021-04-19 04:42:13 +00:00
ecryptfs_kernel.h ecryptfs: constify path 2022-09-01 17:40:38 -04:00
file.c splice: Use filemap_splice_read() instead of generic_file_splice_read() 2023-05-24 08:42:17 -06:00
inode.c fs: drop unused posix acl handlers 2023-03-06 09:57:12 +01:00
Kconfig docs: filesystems: fix renamed references 2020-04-20 15:45:22 -06:00
keystore.c ecryptfs: keystore: Fix some kernel-doc issues and demote non-conformant headers 2021-04-19 04:42:13 +00:00
kthread.c ecryptfs: kthread: Demote file header and provide description for 'cred' 2021-04-19 04:42:13 +00:00
main.c ecryptfs: constify path 2022-09-01 17:40:38 -04:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
messaging.c eCryptfs: Use DEFINE_MUTEX() for mutex lock 2021-04-19 04:42:13 +00:00
miscdev.c ecryptfs: miscdev: File headers are not good kernel-doc candidates 2021-04-19 04:42:13 +00:00
mmap.c fs: port xattr to mnt_idmap 2023-01-19 09:24:28 +01:00
read_write.c fs/ecryptfs: Use kmap_local_page() in ecryptfs_write() 2023-07-10 14:36:10 +02:00
super.c fs: allocate inode by using alloc_inode_sb() 2022-03-22 15:57:03 -07:00