arch/tile: Various cleanups.

This change rolls up random cleanups not representing any actual bugs.

- Remove a stale CONFIG_ value from the default tile_defconfig
- Remove unused tns_atomic_xxx() family of methods from <asm/atomic.h>
- Optimize get_order() using Tile's "clz" instruction
- Fix a bad hypervisor upcall name (not currently used in Linux anyway)
- Use __copy_in_user_inatomic() name for consistency, and export it
- Export some additional hypervisor driver I/O upcalls and some homecache calls
- Remove the obfuscating MEMCPY_TEST_WH64 support code
- Other stray comment cleanups, #if 0 removal, etc.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>

arch/tile/include/asm/atomic_32.h

@@ -255,43 +255,6 @@ static inline void atomic64_set(atomic64_t *v, u64 n)
 #define smp_mb__after_atomic_dec()	do { } while (0)
 #define smp_mb__after_atomic_inc()	do { } while (0)
 
-
-/*
- * Support "tns" atomic integers.  These are atomic integers that can
- * hold any value but "1".  They are more efficient than regular atomic
- * operations because the "lock" (aka acquire) step is a single "tns"
- * in the uncontended case, and the "unlock" (aka release) step is a
- * single "store" without an mf.  (However, note that on tilepro the
- * "tns" will evict the local cache line, so it's not all upside.)
- *
- * Note that you can ONLY observe the value stored in the pointer
- * using these operations; a direct read of the value may confusingly
- * return the special value "1".
- */
-
-int __tns_atomic_acquire(atomic_t *);
-void __tns_atomic_release(atomic_t *p, int v);
-
-static inline void tns_atomic_set(atomic_t *v, int i)
-{
-	__tns_atomic_acquire(v);
-	__tns_atomic_release(v, i);
-}
-
-static inline int tns_atomic_cmpxchg(atomic_t *v, int o, int n)
-{
-	int ret = __tns_atomic_acquire(v);
-	__tns_atomic_release(v, (ret == o) ? n : ret);
-	return ret;
-}
-
-static inline int tns_atomic_xchg(atomic_t *v, int n)
-{
-	int ret = __tns_atomic_acquire(v);
-	__tns_atomic_release(v, n);
-	return ret;
-}
-
 #endif /* !__ASSEMBLY__ */
 
 /*

arch/tile/include/asm/page.h

@@ -129,6 +129,11 @@ static inline u64 pmd_val(pmd_t pmd)
 
 #endif
 
+static inline __attribute_const__ int get_order(unsigned long size)
+{
+	return BITS_PER_LONG - __builtin_clzl((size - 1) >> PAGE_SHIFT);
+}
+
 #endif /* !__ASSEMBLY__ */
 
 #define HUGETLB_PAGE_ORDER	(HPAGE_SHIFT - PAGE_SHIFT)
@@ -332,7 +337,6 @@ extern pte_t *virt_to_pte(struct mm_struct *mm, unsigned long addr);
 	(VM_READ | VM_WRITE | VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
 
 #include <asm-generic/memory_model.h>
-#include <asm-generic/getorder.h>
 
 #endif /* __KERNEL__ */
 

arch/tile/include/asm/uaccess.h

@@ -389,14 +389,14 @@ static inline unsigned long __must_check copy_from_user(void *to,
  * Returns number of bytes that could not be copied.
  * On success, this will be zero.
  */
-extern unsigned long __copy_in_user_asm(
+extern unsigned long __copy_in_user_inatomic(
 	void __user *to, const void __user *from, unsigned long n);
 
 static inline unsigned long __must_check
 __copy_in_user(void __user *to, const void __user *from, unsigned long n)
 {
 	might_sleep();
-	return __copy_in_user_asm(to, from, n);
+	return __copy_in_user_inatomic(to, from, n);
 }
 
 static inline unsigned long __must_check

arch/tile/include/hv/hypervisor.h

@@ -532,11 +532,11 @@ void hv_disable_intr(HV_IntrMask disab_mask);
  */
 void hv_clear_intr(HV_IntrMask clear_mask);
 
-/** Assert a set of device interrupts.
+/** Raise a set of device interrupts.
  *
- * @param assert_mask Bitmap of interrupts to clear.
+ * @param raise_mask Bitmap of interrupts to raise.
  */
-void hv_assert_intr(HV_IntrMask assert_mask);
+void hv_raise_intr(HV_IntrMask raise_mask);
 
 /** Trigger a one-shot interrupt on some tile
  *
@@ -1712,7 +1712,7 @@ typedef struct
  * @param cache_control This argument allows you to specify a length of
  *        physical address space to flush (maximum HV_FLUSH_MAX_CACHE_LEN).
  *        You can "or" in HV_FLUSH_EVICT_L2 to flush the whole L2 cache.
- *        You can "or" in HV_FLUSH_EVICT_LI1 to flush the whole LII cache.
+ *        You can "or" in HV_FLUSH_EVICT_L1I to flush the whole L1I cache.
  *        HV_FLUSH_ALL flushes all caches.
  * @param cache_cpumask Bitmask (in row-major order, supervisor-relative) of
  *        tile indices to perform cache flush on.  The low bit of the first