diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-03-12 14:26:05 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-03-16 23:08:40 +0300 |
| commit | 400b9b93441cd4e2fe824a70140f3d5a2a9c802b (patch) | |
| tree | e508eed41dcc3132bddaaca8700217d1a86a86bb /include/linux/sched | |
| parent | f7d304343b9d2456ffba23b99d2345408251ea45 (diff) | |
| download | linux-400b9b93441cd4e2fe824a70140f3d5a2a9c802b.tar.xz | |
iommu/sva: Replace pasid_valid() helper with mm_valid_pasid()
Kernel has few users of pasid_valid() and all but one checks if the
process has PASID allocated. The helper takes ioasid_t as the input.
Replace the helper with mm_valid_pasid() that takes mm_struct as the
argument. The only call that checks PASID that is not tied to mm_struct
is open-codded now.
This is preparatory patch. It helps avoid ifdeffery: no need to
dereference mm->pasid in generic code to check if the process has PASID.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20230312112612.31869-11-kirill.shutemov%40linux.intel.com
Diffstat (limited to 'include/linux/sched')
| -rw-r--r-- | include/linux/sched/mm.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/sched/mm.h b/include/linux/sched/mm.h index 2a243616f222..b69fe7e8c0ac 100644 --- a/include/linux/sched/mm.h +++ b/include/linux/sched/mm.h @@ -457,6 +457,11 @@ static inline void mm_pasid_init(struct mm_struct *mm) mm->pasid = INVALID_IOASID; } +static inline bool mm_valid_pasid(struct mm_struct *mm) +{ + return mm->pasid != INVALID_IOASID; +} + /* Associate a PASID with an mm_struct: */ static inline void mm_pasid_set(struct mm_struct *mm, u32 pasid) { @@ -465,13 +470,14 @@ static inline void mm_pasid_set(struct mm_struct *mm, u32 pasid) static inline void mm_pasid_drop(struct mm_struct *mm) { - if (pasid_valid(mm->pasid)) { + if (mm_valid_pasid(mm)) { ioasid_free(mm->pasid); mm->pasid = INVALID_IOASID; } } #else static inline void mm_pasid_init(struct mm_struct *mm) {} +static inline bool mm_valid_pasid(struct mm_struct *mm) { return false; } static inline void mm_pasid_set(struct mm_struct *mm, u32 pasid) {} static inline void mm_pasid_drop(struct mm_struct *mm) {} #endif |