Release 4.14 arch/frv/kernel/futex.c
/* futex.c: futex operations
*
* Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <linux/futex.h>
#include <linux/uaccess.h>
#include <asm/futex.h>
#include <asm/errno.h>
/*
* the various futex operations; MMU fault checking is ignored under no-MMU
* conditions
*/
static inline int atomic_futex_op_xchg_set(int oparg, u32 __user *uaddr, int *_oldval)
{
int oldval, ret;
asm("0: \n"
" orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
" ckeq icc3,cc7 \n"
"1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
" orcr cc7,cc7,cc3 \n" /* set CC3 to true */
"2: cst.p %3,%M0 ,cc3,#1 \n"
" corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
" beq icc3,#0,0b \n"
" setlos 0,%2 \n"
"3: \n"
".subsection 2 \n"
"4: setlos %5,%2 \n"
" bra 3b \n"
".previous \n"
".section __ex_table,\"a\" \n"
" .balign 8 \n"
" .long 1b,4b \n"
" .long 2b,4b \n"
".previous"
: "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
: "3"(oparg), "i"(-EFAULT)
: "memory", "cc7", "cc3", "icc3"
);
*_oldval = oldval;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 40 | 97.56% | 1 | 50.00% |
| Michel Lespinasse | 1 | 2.44% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
static inline int atomic_futex_op_xchg_add(int oparg, u32 __user *uaddr, int *_oldval)
{
int oldval, ret;
asm("0: \n"
" orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
" ckeq icc3,cc7 \n"
"1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
" orcr cc7,cc7,cc3 \n" /* set CC3 to true */
" add %1,%3,%3 \n"
"2: cst.p %3,%M0 ,cc3,#1 \n"
" corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
" beq icc3,#0,0b \n"
" setlos 0,%2 \n"
"3: \n"
".subsection 2 \n"
"4: setlos %5,%2 \n"
" bra 3b \n"
".previous \n"
".section __ex_table,\"a\" \n"
" .balign 8 \n"
" .long 1b,4b \n"
" .long 2b,4b \n"
".previous"
: "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
: "3"(oparg), "i"(-EFAULT)
: "memory", "cc7", "cc3", "icc3"
);
*_oldval = oldval;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 40 | 97.56% | 1 | 50.00% |
| Michel Lespinasse | 1 | 2.44% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
static inline int atomic_futex_op_xchg_or(int oparg, u32 __user *uaddr, int *_oldval)
{
int oldval, ret;
asm("0: \n"
" orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
" ckeq icc3,cc7 \n"
"1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
" orcr cc7,cc7,cc3 \n" /* set CC3 to true */
" or %1,%3,%3 \n"
"2: cst.p %3,%M0 ,cc3,#1 \n"
" corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
" beq icc3,#0,0b \n"
" setlos 0,%2 \n"
"3: \n"
".subsection 2 \n"
"4: setlos %5,%2 \n"
" bra 3b \n"
".previous \n"
".section __ex_table,\"a\" \n"
" .balign 8 \n"
" .long 1b,4b \n"
" .long 2b,4b \n"
".previous"
: "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
: "3"(oparg), "i"(-EFAULT)
: "memory", "cc7", "cc3", "icc3"
);
*_oldval = oldval;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 40 | 97.56% | 1 | 50.00% |
| Michel Lespinasse | 1 | 2.44% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
static inline int atomic_futex_op_xchg_and(int oparg, u32 __user *uaddr, int *_oldval)
{
int oldval, ret;
asm("0: \n"
" orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
" ckeq icc3,cc7 \n"
"1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
" orcr cc7,cc7,cc3 \n" /* set CC3 to true */
" and %1,%3,%3 \n"
"2: cst.p %3,%M0 ,cc3,#1 \n"
" corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
" beq icc3,#0,0b \n"
" setlos 0,%2 \n"
"3: \n"
".subsection 2 \n"
"4: setlos %5,%2 \n"
" bra 3b \n"
".previous \n"
".section __ex_table,\"a\" \n"
" .balign 8 \n"
" .long 1b,4b \n"
" .long 2b,4b \n"
".previous"
: "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
: "3"(oparg), "i"(-EFAULT)
: "memory", "cc7", "cc3", "icc3"
);
*_oldval = oldval;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 40 | 97.56% | 1 | 50.00% |
| Michel Lespinasse | 1 | 2.44% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
static inline int atomic_futex_op_xchg_xor(int oparg, u32 __user *uaddr, int *_oldval)
{
int oldval, ret;
asm("0: \n"
" orcc gr0,gr0,gr0,icc3 \n" /* set ICC3.Z */
" ckeq icc3,cc7 \n"
"1: ld.p %M0,%1 \n" /* LD.P/ORCR must be atomic */
" orcr cc7,cc7,cc3 \n" /* set CC3 to true */
" xor %1,%3,%3 \n"
"2: cst.p %3,%M0 ,cc3,#1 \n"
" corcc gr29,gr29,gr0 ,cc3,#1 \n" /* clear ICC3.Z if store happens */
" beq icc3,#0,0b \n"
" setlos 0,%2 \n"
"3: \n"
".subsection 2 \n"
"4: setlos %5,%2 \n"
" bra 3b \n"
".previous \n"
".section __ex_table,\"a\" \n"
" .balign 8 \n"
" .long 1b,4b \n"
" .long 2b,4b \n"
".previous"
: "+U"(*uaddr), "=&r"(oldval), "=&r"(ret), "=r"(oparg)
: "3"(oparg), "i"(-EFAULT)
: "memory", "cc7", "cc3", "icc3"
);
*_oldval = oldval;
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 40 | 97.56% | 1 | 50.00% |
| Michel Lespinasse | 1 | 2.44% | 1 | 50.00% |
| Total | 41 | 100.00% | 2 | 100.00% |
/*****************************************************************************/
/*
* do the futex operations
*/
int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, u32 __user *uaddr)
{
int oldval = 0, ret;
pagefault_disable();
switch (op) {
case FUTEX_OP_SET:
ret = atomic_futex_op_xchg_set(oparg, uaddr, &oldval);
break;
case FUTEX_OP_ADD:
ret = atomic_futex_op_xchg_add(oparg, uaddr, &oldval);
break;
case FUTEX_OP_OR:
ret = atomic_futex_op_xchg_or(oparg, uaddr, &oldval);
break;
case FUTEX_OP_ANDN:
ret = atomic_futex_op_xchg_and(~oparg, uaddr, &oldval);
break;
case FUTEX_OP_XOR:
ret = atomic_futex_op_xchg_xor(oparg, uaddr, &oldval);
break;
default:
ret = -ENOSYS;
break;
}
pagefault_enable();
if (!ret)
*oval = oldval;
return ret;
} Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 126 | 90.00% | 1 | 25.00% |
| Jiri Slaby | 11 | 7.86% | 1 | 25.00% |
| Peter Zijlstra | 2 | 1.43% | 1 | 25.00% |
| Michel Lespinasse | 1 | 0.71% | 1 | 25.00% |
| Total | 140 | 100.00% | 4 | 100.00% |
/* end arch_futex_atomic_op_inuser() */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| David Howells | 339 | 93.65% | 1 | 20.00% |
| Jiri Slaby | 12 | 3.31% | 1 | 20.00% |
| Michel Lespinasse | 6 | 1.66% | 1 | 20.00% |
| Adrian Bunk | 3 | 0.83% | 1 | 20.00% |
| Peter Zijlstra | 2 | 0.55% | 1 | 20.00% |
| Total | 362 | 100.00% | 5 | 100.00% |
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