* the libc and compiler builtin ffs routines, therefore
* differs in spirit from the above ffz (man ffs).
*/
-static __always_inline int ffs(int x)
-{
- return __builtin_ffs(x);
-}
+#define ffs(x) __builtin_ffs(x)
#endif
*/
static inline int queued_read_trylock(struct qrwlock *lock)
{
- u32 cnts;
+ int cnts;
cnts = atomic_read(&lock->cnts);
if (likely(!(cnts & _QW_WMASK))) {
*/
static inline int queued_write_trylock(struct qrwlock *lock)
{
- u32 cnts;
+ int cnts;
cnts = atomic_read(&lock->cnts);
if (unlikely(cnts))
*/
static inline void queued_read_lock(struct qrwlock *lock)
{
- u32 cnts;
+ int cnts;
cnts = atomic_add_return_acquire(_QR_BIAS, &lock->cnts);
if (likely(!(cnts & _QW_WMASK)))
*/
static inline void queued_write_lock(struct qrwlock *lock)
{
- u32 cnts = 0;
+ int cnts = 0;
/* Optimize for the unfair lock case where the fair flag is 0. */
if (likely(atomic_try_cmpxchg_acquire(&lock->cnts, &cnts, _QW_LOCKED)))
return;
*/
static __always_inline int queued_spin_trylock(struct qspinlock *lock)
{
- u32 val = atomic_read(&lock->val);
+ int val = atomic_read(&lock->val);
if (unlikely(val))
return 0;
*/
static __always_inline void queued_spin_lock(struct qspinlock *lock)
{
- u32 val = 0;
+ int val = 0;
if (likely(atomic_try_cmpxchg_acquire(&lock->val, &val, _Q_LOCKED_VAL)))
return;
/* Attributes */
#include <linux/compiler_attributes.h>
+/* Builtins */
+
+/*
+ * __has_builtin is supported on gcc >= 10, clang >= 3 and icc >= 21.
+ * In the meantime, to support gcc < 10, we implement __has_builtin
+ * by hand.
+ */
+#ifndef __has_builtin
+#define __has_builtin(x) (0)
+#endif
+
/* Compiler specific macros. */
#ifdef __clang__
#include <linux/compiler-clang.h>
#ifndef _LINUX_CTYPE_H
#define _LINUX_CTYPE_H
+#include <linux/compiler.h>
+
/*
* NOTE! This ctype does not handle EOF like the standard C
* library is required to.
#define isalnum(c) ((__ismask(c)&(_U|_L|_D)) != 0)
#define isalpha(c) ((__ismask(c)&(_U|_L)) != 0)
#define iscntrl(c) ((__ismask(c)&(_C)) != 0)
-static inline int isdigit(int c)
-{
- return '0' <= c && c <= '9';
-}
#define isgraph(c) ((__ismask(c)&(_P|_U|_L|_D)) != 0)
#define islower(c) ((__ismask(c)&(_L)) != 0)
#define isprint(c) ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
#define isascii(c) (((unsigned char)(c))<=0x7f)
#define toascii(c) (((unsigned char)(c))&0x7f)
+#if __has_builtin(__builtin_isdigit)
+#define isdigit(c) __builtin_isdigit(c)
+#else
+static inline int isdigit(int c)
+{
+ return '0' <= c && c <= '9';
+}
+#endif
+
static inline unsigned char __tolower(unsigned char c)
{
if (isupper(c))
asmlinkage long sys_adjtimex(struct __kernel_timex __user *txc_p);
asmlinkage long sys_adjtimex_time32(struct old_timex32 __user *txc_p);
-/* kernel/timer.c */
+/* kernel/sys.c */
asmlinkage long sys_getpid(void);
asmlinkage long sys_getppid(void);
asmlinkage long sys_getuid(void);
#include <asm/ipcbuf.h>
/*
- * The semid64_ds structure for x86 architecture.
- * Note extra padding because this structure is passed back and forth
- * between kernel and user space.
+ * The semid64_ds structure for most architectures (though it came from x86_32
+ * originally). Note extra padding because this structure is passed back and
+ * forth between kernel and user space.
*
* semid64_ds was originally meant to be architecture specific, but
* everyone just ended up making identical copies without specific
__SC_3264(__NR_adjtimex, sys_adjtimex_time32, sys_adjtimex)
#endif
-/* kernel/timer.c */
+/* kernel/sys.c */
#define __NR_getpid 172
__SYSCALL(__NR_getpid, sys_getpid)
#define __NR_getppid 173