uint32_t amdgpu_amdkfd_get_num_gws(struct kgd_dev *kgd);
uint8_t amdgpu_amdkfd_get_xgmi_hops_count(struct kgd_dev *dst, struct kgd_dev *src);
+/* Read user wptr from a specified user address space with page fault
+ * disabled. The memory must be pinned and mapped to the hardware when
+ * this is called in hqd_load functions, so it should never fault in
+ * the first place. This resolves a circular lock dependency involving
+ * four locks, including the DQM lock and mmap_sem.
+ */
#define read_user_wptr(mmptr, wptr, dst) \
({ \
bool valid = false; \
if ((mmptr) && (wptr)) { \
+ pagefault_disable(); \
if ((mmptr) == current->mm) { \
valid = !get_user((dst), (wptr)); \
} else if (current->mm == NULL) { \
valid = !get_user((dst), (wptr)); \
unuse_mm(mmptr); \
} \
+ pagefault_enable(); \
} \
valid; \
})