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| author |   Victor Aoqui <victora@linux.vnet.ibm.com> | 2017-07-20 14:26:06 -0300 |
|---|---|---|
| committer |   Michael Ellerman <mpe@ellerman.id.au> | 2017-08-01 21:49:23 +1000 |
| commit | 75f327c6b75715f3a090daeb33e05003aaffb010 (patch) | |
| tree | 706f9ad972c7a968b4fd81d3c5cda532bd472f45 /arch/powerpc/kernel/iommu.c | |
| parent | powerpc/powernv: Clear PECE1 in LPCR via stop-api only on Hotplug (diff) | |
| download | linux-dev-75f327c6b75715f3a090daeb33e05003aaffb010.tar.xz linux-dev-75f327c6b75715f3a090daeb33e05003aaffb010.zip | |
powerpc/kernel: Avoid preemption check in iommu_range_alloc()
Replace the __this_cpu_read() with raw_cpu_read() in
iommu_range_alloc(). Otherwise we get a warning about using
__this_cpu_read() in preemptible code:
BUG: using __this_cpu_read() in preemptible
caller is iommu_range_alloc+0xa8/0x3d0
Preemption doesn't need to be disabled since according to the comment
any CPU can safely use any IOMMU pool.
Signed-off-by: Victor Aoqui <victora@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/iommu.c')
| -rw-r--r-- | arch/powerpc/kernel/iommu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/iommu.c b/arch/powerpc/kernel/iommu.c index 233ca3fe4754..0e49a4560cff 100644 --- a/arch/powerpc/kernel/iommu.c +++ b/arch/powerpc/kernel/iommu.c @@ -208,7 +208,7 @@ static unsigned long iommu_range_alloc(struct device *dev, * We don't need to disable preemption here because any CPU can * safely use any IOMMU pool. */ - pool_nr = __this_cpu_read(iommu_pool_hash) & (tbl->nr_pools - 1); + pool_nr = raw_cpu_read(iommu_pool_hash) & (tbl->nr_pools - 1); if (largealloc) pool = &(tbl->large_pool); |