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| author | Keith Busch <kbusch@kernel.org> | 2023-10-30 16:13:09 +0100 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2023-12-04 17:39:03 +0100 |
| commit | 5c687c287c46fadb14644091823298875a5216aa (patch) | |
| tree | 128648783e08c11c1c5ebff84928547f7656cb69 /drivers/nvme/host/nvme.h | |
| parent | Merge tag 'md-fixes-20231201-1' of https://git.kernel.org/pub/scm/linux/kerne... (diff) | |
| download | linux-5c687c287c46fadb14644091823298875a5216aa.tar.xz linux-5c687c287c46fadb14644091823298875a5216aa.zip | |
nvme: introduce helper function to get ctrl state
The controller state is typically written by another CPU, so reading it
should ensure no optimizations are taken. This is a repeated pattern in
the driver, so start with adding a convenience function that returns the
controller state with READ_ONCE().
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme/host/nvme.h')
| -rw-r--r-- | drivers/nvme/host/nvme.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 39a90b7cb125..578e6d311bc9 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -387,6 +387,11 @@ struct nvme_ctrl { enum nvme_dctype dctype; }; +static inline enum nvme_ctrl_state nvme_ctrl_state(struct nvme_ctrl *ctrl) +{ + return READ_ONCE(ctrl->state); +} + enum nvme_iopolicy { NVME_IOPOLICY_NUMA, NVME_IOPOLICY_RR, |