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| author |   Christoph Hellwig <hch@lst.de> | 2018-04-03 15:41:07 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-05-09 06:55:44 +0200 |
| commit | 79c1879ee5473e3404469b07f9bccfe6d0814b93 (patch) | |
| tree | 7dfd4e224cd8bf1e4790ba8505fd25569f019155 /include/linux/iommu-helper.h | |
| parent | iommu-helper: unexport iommu_area_alloc (diff) | |
| download | linux-dev-79c1879ee5473e3404469b07f9bccfe6d0814b93.tar.xz linux-dev-79c1879ee5473e3404469b07f9bccfe6d0814b93.zip | |
iommu-helper: mark iommu_is_span_boundary as inline
This avoids selecting IOMMU_HELPER just for this function. And we only
use it once or twice in normal builds so this often even is a size
reduction.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'include/linux/iommu-helper.h')
| -rw-r--r-- | include/linux/iommu-helper.h | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/include/linux/iommu-helper.h b/include/linux/iommu-helper.h index cb9a9248c8c0..70d01edcbf8b 100644 --- a/include/linux/iommu-helper.h +++ b/include/linux/iommu-helper.h @@ -2,6 +2,7 @@ #ifndef _LINUX_IOMMU_HELPER_H #define _LINUX_IOMMU_HELPER_H +#include <linux/bug.h> #include <linux/kernel.h> static inline unsigned long iommu_device_max_index(unsigned long size, @@ -14,9 +15,15 @@ static inline unsigned long iommu_device_max_index(unsigned long size, return size; } -extern int iommu_is_span_boundary(unsigned int index, unsigned int nr, - unsigned long shift, - unsigned long boundary_size); +static inline int iommu_is_span_boundary(unsigned int index, unsigned int nr, + unsigned long shift, unsigned long boundary_size) +{ + BUG_ON(!is_power_of_2(boundary_size)); + + shift = (shift + index) & (boundary_size - 1); + return shift + nr > boundary_size; +} + extern unsigned long iommu_area_alloc(unsigned long *map, unsigned long size, unsigned long start, unsigned int nr, unsigned long shift, |