diff options
| author | Mark Brown <broonie@kernel.org> | 2026-08-04 13:47:02 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2026-08-04 13:47:02 +0100 |
| commit | 0c8e7a014e5d232d65dfd9488d9ad62b03e6b2aa (patch) | |
| tree | 99fbc42d0288e073c164abfd42f732e46880f8bb /include/linux/ptr_ring.h | |
| parent | 98e69afa6d571b1e7981d5a88911f8a7e2e3cb7d (diff) | |
| parent | 012c1b04f528c865a372884d6f6240279b065627 (diff) | |
spi: Add support for StarFive JHB100 SFC
Changhuang Liang <changhuang.liang@starfivetech.com> says:
This serial add support for the StarFive JHB100 SoC SPI Flash
Controller (SFC), which is based on the Synopsys DesignWare SSI
version 2.00a but with some customizations and it also add
enhanced SPI for DesignWare SPI controllers.
I picked up some patches from series [1].
This series depends on the series [2]:
[1] https://lore.kernel.org/all/20221212180732.79167-1-sudip.mukherjee@sifive.com/
[2] https://lore.kernel.org/all/20260521012932.24163-1-changhuang.liang@starfivetech.com/
v1: https://lore.kernel.org/all/20260709055204.138168-1-changhuang.liang@starfivetech.com/
Link: https://patch.msgid.link/20260803124044.156998-1-changhuang.liang@starfivetech.com
Diffstat (limited to 'include/linux/ptr_ring.h')
| -rw-r--r-- | include/linux/ptr_ring.h | 20 |
1 files changed, 2 insertions, 18 deletions
diff --git a/include/linux/ptr_ring.h b/include/linux/ptr_ring.h index c95e891903f0..d2c3629bbe45 100644 --- a/include/linux/ptr_ring.h +++ b/include/linux/ptr_ring.h @@ -98,29 +98,13 @@ static inline bool ptr_ring_full_bh(struct ptr_ring *r) /* Note: callers invoking this in a loop must use a compiler barrier, * for example cpu_relax(). Callers must hold producer_lock. - */ -static inline int __ptr_ring_check_produce(struct ptr_ring *r) -{ - if (unlikely(!r->size)) - return -EINVAL; - - if (data_race(r->queue[r->producer])) - return -ENOSPC; - - return 0; -} - -/* Note: callers invoking this in a loop must use a compiler barrier, - * for example cpu_relax(). Callers must hold producer_lock. * Callers are responsible for making sure pointer that is being queued * points to a valid data. */ static inline int __ptr_ring_produce(struct ptr_ring *r, void *ptr) { - int p = __ptr_ring_check_produce(r); - - if (p) - return p; + if (unlikely(!r->size) || data_race(r->queue[r->producer])) + return -ENOSPC; /* Make sure the pointer we are storing points to a valid data. */ /* Pairs with the dependency ordering in __ptr_ring_consume. */ |