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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2024-06-20 15:21:54 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-06-24 16:41:22 -0700 |
| commit | bdacf3e34945232037979b977d7f409f734a7226 (patch) | |
| tree | ef73eb7e2aadb3bf11e0806746de24032a3935d1 /net/ipv4/tcp_ipv4.c | |
| parent | 43d7ca2907cb0e8a23d73934a5cf000e24b0aa22 (diff) | |
| download | linux-bdacf3e34945232037979b977d7f409f734a7226.tar.gz linux-bdacf3e34945232037979b977d7f409f734a7226.tar.bz2 linux-bdacf3e34945232037979b977d7f409f734a7226.zip | |
net: Use nested-BH locking for napi_alloc_cache.
napi_alloc_cache is a per-CPU variable and relies on disabled BH for its
locking. Without per-CPU locking in local_bh_disable() on PREEMPT_RT
this data structure requires explicit locking.
Add a local_lock_t to the data structure and use local_lock_nested_bh()
for locking. This change adds only lockdep coverage and does not alter
the functional behaviour for !PREEMPT_RT.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Link: https://patch.msgid.link/20240620132727.660738-5-bigeasy@linutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
0 files changed, 0 insertions, 0 deletions