linux/fs/bcachefs/seqmutex.h, branch masterMirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
https://git.shady.money/linux/atom?h=master2025-09-29T20:43:52ZRemove bcachefs core code2025-09-29T20:43:52ZLinus Torvaldstorvalds@linux-foundation.org2025-09-29T20:43:52Zurn:sha1:f2c61db29f277b9c80de92102fc532cc247495cd
bcachefs was marked 'externally maintained' in 6.17 but the code
remained to make the transition smoother.
It's now a DKMS module, making the in-kernel code stale, so remove
it to avoid any version confusion.
Link: https://lore.kernel.org/linux-bcachefs/yokpt2d2g2lluyomtqrdvmkl3amv3kgnipmenobkpgx537kay7@xgcgjviv3n7x/T/
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
bcachefs: fix seqmutex_relock()2024-06-23T04:57:21ZKent Overstreetkent.overstreet@linux.dev2024-06-23T00:52:39Zurn:sha1:f44cc269a1c148ad83332d85fe54607e8874ca79
We were grabbing the sequence number before unlock incremented it - fix
this by moving the increment to seqmutex_lock() (so the seqmutex_relock()
failure path skips the mutex_trylock()), and returning the sequence
number from unlock(), to make the API simpler and safer.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
bcachefs: seqmutex; fix a lockdep splat2023-10-22T21:10:04ZKent Overstreetkent.overstreet@linux.dev2023-06-20T01:01:13Zurn:sha1:a5b696ee6e10103def82ea9abc18958912e81b00
We can't be holding btree_trans_lock while copying to user space, which
might incur a page fault. To fix this, convert it to a seqmutex so we
can unlock/relock.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>