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| 2 | |
| 3 | * S390 version
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| 4 | * Copyright IBM Corp. 1999
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| 5 | * Author(s): Martin Schwidefsky ([email protected])
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| 6 | *
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| 7 | * Derived from "include/asm-i386/current.h"
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| 8 |
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| 9 |
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| 10 | #ifndef _S390_CURRENT_H
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| 11 | #define _S390_CURRENT_H
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| 12 |
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| 13 | #include <asm/lowcore.h>
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| 14 | #include <asm/machine.h>
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| 15 |
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| 16 | struct task_struct;
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| 17 |
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| 18 | static __always_inline struct task_struct *get_current(void)
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| 19 | {
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| 20 | unsigned long ptr, lc_current;
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| 21 |
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| 22 | lc_current = offsetof(struct lowcore, current_task);
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| 23 | asm_inline(
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| 24 | ALTERNATIVE(" lg %[ptr],%[offzero](%%r0)\n",
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| 25 | " lg %[ptr],%[offalt](%%r0)\n",
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| 26 | ALT_FEATURE(MFEATURE_LOWCORE))
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| 27 | : [ptr] "=d" (ptr)
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| 28 | : [offzero] "i" (lc_current),
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| 29 | [offalt] "i" (lc_current + LOWCORE_ALT_ADDRESS));
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| 30 | return (struct task_struct *)ptr;
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| 31 | }
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| 32 |
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| 33 | #define current get_current()
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| 34 |
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| 35 | #endif
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