cregit-Linux how code gets into the kernel

Release 4.12 include/linux/futex.h

Directory: include/linux
#ifndef _LINUX_FUTEX_H

#define _LINUX_FUTEX_H

#include <linux/ktime.h>
#include <uapi/linux/futex.h>

struct inode;
struct mm_struct;
struct task_struct;

long do_futex(u32 __user *uaddr, int op, u32 val, ktime_t *timeout,
	      u32 __user *uaddr2, u32 val2, u32 val3);

extern int
handle_futex_death(u32 __user *uaddr, struct task_struct *curr, int pi);

 * Futexes are matched on equal values of this key.
 * The key type depends on whether it's a shared or private mapping.
 * Don't rearrange members without looking at hash_futex().
 * offset is aligned to a multiple of sizeof(u32) (== 4) by definition.
 * We use the two low order bits of offset to tell what is the kind of key :
 *  00 : Private process futex (PTHREAD_PROCESS_PRIVATE)
 *       (no reference on an inode or mm)
 *  01 : Shared futex (PTHREAD_PROCESS_SHARED)
 *      mapped on a file (reference on the underlying inode)
 *  10 : Shared futex (PTHREAD_PROCESS_SHARED)
 *       (but private mapping on an mm, and reference taken on it)

#define FUT_OFF_INODE    1 
/* We set bit 0 if key has a reference on inode */

/* We set bit 1 if key has a reference on mm */

union futex_key {
	struct {
unsigned long pgoff;
struct inode *inode;
int offset;
} shared;
	struct {
unsigned long address;
struct mm_struct *mm;
int offset;
} private;
	struct {
unsigned long word;
void *ptr;
int offset;
} both;

#define FUTEX_KEY_INIT (union futex_key) { .both = { .ptr = NULL } }

extern void exit_robust_list(struct task_struct *curr);
extern void exit_pi_state_list(struct task_struct *curr);

#define futex_cmpxchg_enabled 1
extern int futex_cmpxchg_enabled;

static inline void exit_robust_list(struct task_struct *curr) { }


Ingo Molnar11100.00%2100.00%

static inline void exit_pi_state_list(struct task_struct *curr) { }


Ingo Molnar11100.00%2100.00%

#endif #endif

Overall Contributors

Ingo Molnar7838.05%527.78%
Rusty Russell6129.76%211.11%
Andrew Morton199.27%211.11%
Eric Dumazet115.37%15.56%
Heiko Carstens115.37%15.56%
Mike Frysinger94.39%15.56%
Thomas Gleixner83.90%211.11%
Peter Zijlstra41.95%15.56%
David Woodhouse20.98%15.56%
Pierre Peiffer10.49%15.56%
David Howells10.49%15.56%
Directory: include/linux
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