Release 4.11 arch/s390/include/asm/jump_label.h

#ifndef _ASM_S390_JUMP_LABEL_H

#define _ASM_S390_JUMP_LABEL_H

#ifndef __ASSEMBLY__

#include <linux/types.h>
#include <linux/stringify.h>


#define JUMP_LABEL_NOP_SIZE 6

#define JUMP_LABEL_NOP_OFFSET 2

/*
 * We use a brcl 0,2 instruction for jump labels at compile time so it
 * can be easily distinguished from a hotpatch generated instruction.
 */


static __always_inline bool arch_static_branch(struct static_key *key, bool branch)
{
	asm_volatile_goto("0:     brcl 0,"__stringify(JUMP_LABEL_NOP_OFFSET)"\n"
		".pushsection __jump_table, \"aw\"\n"
		".balign 8\n"
		".quad 0b, %l[label], %0\n"
		".popsection\n"
		: : "X" (&((char *)key)[branch]) : : label);

	return false;
label:
	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Peter Zijlstra
29
51.79%
1
16.67%
Jan Glauber
10
17.86%
1
16.67%
Ingo Molnar
9
16.07%
2
33.33%
Heiko Carstens
8
14.29%
2
33.33%
Total
56
100.00%
6
100.00%



static __always_inline bool arch_static_branch_jump(struct static_key *key, bool branch)
{
	asm_volatile_goto("0:     brcl 15, %l[label]\n"
		".pushsection __jump_table, \"aw\"\n"
		".balign 8\n"
		".quad 0b, %l[label], %0\n"
		".popsection\n"
		: : "X" (&((char *)key)[branch]) : : label);

	return false;
label:
	return true;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Peter Zijlstra
35
68.63%
1
33.33%
Jan Glauber
9
17.65%
1
33.33%
Ingo Molnar
7
13.73%
1
33.33%
Total
51
100.00%
3
100.00%


typedef unsigned long jump_label_t;


struct jump_entry {
	
jump_label_t code;
	
jump_label_t target;
	
jump_label_t key;
};

#endif  /* __ASSEMBLY__ */
#endif
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Peter Zijlstra
64
41.29%
1
12.50%
Jan Glauber
51
32.90%
1
12.50%
Ingo Molnar
18
11.61%
2
25.00%
Heiko Carstens
13
8.39%
2
25.00%
Anton Blanchard
6
3.87%
1
12.50%
Jason Baron
3
1.94%
1
12.50%
Total
155
100.00%
8
100.00%
Directory: arch/s390/include/asm

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