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arch/tile: Various cleanups.

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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>
This commit is contained in:
Chris Metcalf
2010-08-13 08:52:19 -04:00
parent 1fcbe027b5
commit c745a8a11f
11 changed files with 40 additions and 92 deletions
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37
arch/tile/include/asm/atomic_32.h
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@@ -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__ */
/*

6
arch/tile/include/asm/page.h
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@@ -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__ */

4
arch/tile/include/asm/uaccess.h
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@@ -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