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8021q: fix a potential memory leak
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1 #ifndef _LINUX_LINKAGE_H
2 #define _LINUX_LINKAGE_H
3
4 #include <linux/compiler.h>
5 #include <linux/stringify.h>
6 #include <linux/export.h>
7 #include <asm/linkage.h>
8
9 /* Some toolchains use other characters (e.g. '`') to mark new line in macro */
10 #ifndef ASM_NL
11 #define ASM_NL ;
12 #endif
13
14 #ifdef __cplusplus
15 #define CPP_ASMLINKAGE extern "C"
16 #else
17 #define CPP_ASMLINKAGE
18 #endif
19
20 #ifndef asmlinkage
21 #define asmlinkage CPP_ASMLINKAGE
22 #endif
23
24 #ifndef cond_syscall
25 #define cond_syscall(x) asm( \
26 ".weak " VMLINUX_SYMBOL_STR(x) "\n\t" \
27 ".set " VMLINUX_SYMBOL_STR(x) "," \
28 VMLINUX_SYMBOL_STR(sys_ni_syscall))
29 #endif
30
31 #ifndef SYSCALL_ALIAS
32 #define SYSCALL_ALIAS(alias, name) asm( \
33 ".globl " VMLINUX_SYMBOL_STR(alias) "\n\t" \
34 ".set " VMLINUX_SYMBOL_STR(alias) "," \
35 VMLINUX_SYMBOL_STR(name))
36 #endif
37
38 #define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE)
39 #define __page_aligned_bss __section(.bss..page_aligned) __aligned(PAGE_SIZE)
40
41 /*
42 * For assembly routines.
43 *
44 * Note when using these that you must specify the appropriate
45 * alignment directives yourself
46 */
47 #define __PAGE_ALIGNED_DATA .section ".data..page_aligned", "aw"
48 #define __PAGE_ALIGNED_BSS .section ".bss..page_aligned", "aw"
49
50 /*
51 * This is used by architectures to keep arguments on the stack
52 * untouched by the compiler by keeping them live until the end.
53 * The argument stack may be owned by the assembly-language
54 * caller, not the callee, and gcc doesn't always understand
55 * that.
56 *
57 * We have the return value, and a maximum of six arguments.
58 *
59 * This should always be followed by a "return ret" for the
60 * protection to work (ie no more work that the compiler might
61 * end up needing stack temporaries for).
62 */
63 /* Assembly files may be compiled with -traditional .. */
64 #ifndef __ASSEMBLY__
65 #ifndef asmlinkage_protect
66 # define asmlinkage_protect(n, ret, args...) do { } while (0)
67 #endif
68 #endif
69
70 #ifndef __ALIGN
71 #define __ALIGN .align 4,0x90
72 #define __ALIGN_STR ".align 4,0x90"
73 #endif
74
75 #ifdef __ASSEMBLY__
76
77 #ifndef LINKER_SCRIPT
78 #define ALIGN __ALIGN
79 #define ALIGN_STR __ALIGN_STR
80
81 #ifndef ENTRY
82 #define ENTRY(name) \
83 .globl name ASM_NL \
84 ALIGN ASM_NL \
85 name:
86 #endif
87 #endif /* LINKER_SCRIPT */
88
89 #ifndef WEAK
90 #define WEAK(name) \
91 .weak name ASM_NL \
92 name:
93 #endif
94
95 #ifndef END
96 #define END(name) \
97 .size name, .-name
98 #endif
99
100 /* If symbol 'name' is treated as a subroutine (gets called, and returns)
101 * then please use ENDPROC to mark 'name' as STT_FUNC for the benefit of
102 * static analysis tools such as stack depth analyzer.
103 */
104 #ifndef ENDPROC
105 #define ENDPROC(name) \
106 .type name, @function ASM_NL \
107 END(name)
108 #endif
109
110 #endif
111
112 #endif