kernel/git/stable/linux.git/fs/bcachefs/seqmutex.h, branch linux-6.16.yLinux kernel stable treehttps://git.rulkc.org/pub/scm/linux/kernel/git/stable/linux.git/atom?h=linux-6.16.y2024-06-23T04:57:21+00:00bcachefs: fix seqmutex_relock()2024-06-23T04:57:21+00:00Kent Overstreetkent.overstreet@linux.dev2024-06-23T00:52:39+00:00urn: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 splat2023-10-22T21:10:04+00:00Kent Overstreetkent.overstreet@linux.dev2023-06-20T01:01:13+00:00urn: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>