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Rev 5056 | Rev 6936 | ||
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Line 11... | Line 11... | ||
11 | #include |
11 | #include |
Line 12... | Line 12... | ||
12 | 12 | ||
13 | /* Simplified asprintf. */ |
13 | /* Simplified asprintf. */ |
14 | char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap) |
14 | char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap) |
15 | { |
15 | { |
16 | unsigned int len; |
16 | unsigned int first, second; |
17 | char *p; |
17 | char *p; |
Line 18... | Line 18... | ||
18 | va_list aq; |
18 | va_list aq; |
19 | 19 | ||
20 | va_copy(aq, ap); |
20 | va_copy(aq, ap); |
Line 21... | Line 21... | ||
21 | len = vsnprintf(NULL, 0, fmt, aq); |
21 | first = vsnprintf(NULL, 0, fmt, aq); |
22 | va_end(aq); |
22 | va_end(aq); |
23 | 23 | ||
Line 24... | Line 24... | ||
24 | p = kmalloc(len+1, gfp); |
24 | p = kmalloc(first+1, gfp); |
- | 25 | if (!p) |
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- | 26 | return NULL; |
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Line 25... | Line 27... | ||
25 | if (!p) |
27 | |
26 | return NULL; |
28 | second = vsnprintf(p, first+1, fmt, ap); |
27 | 29 | WARN(first != second, "different return values (%u and %u) from vsnprintf(\"%s\", ...)", |
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Line -... | Line 30... | ||
- | 30 | first, second, fmt); |
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- | 31 | ||
- | 32 | return p; |
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- | 33 | } |
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- | 34 | EXPORT_SYMBOL(kvasprintf); |
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- | 35 | ||
- | 36 | /* |
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- | 37 | * If fmt contains no % (or is exactly %s), use kstrdup_const. If fmt |
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- | 38 | * (or the sole vararg) points to rodata, we will then save a memory |
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- | 39 | * allocation and string copy. In any case, the return value should be |
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- | 40 | * freed using kfree_const(). |
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- | 41 | */ |
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- | 42 | const char *kvasprintf_const(gfp_t gfp, const char *fmt, va_list ap) |
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- | 43 | { |
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- | 44 | if (!strchr(fmt, '%')) |
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- | 45 | return strdup(fmt); |
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28 | vsnprintf(p, len+1, fmt, ap); |
46 | if (!strcmp(fmt, "%s")) |
29 | 47 | return strdup(va_arg(ap, const char*)); |
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30 | return p; |
48 | return kvasprintf(gfp, fmt, ap); |
31 | } |
49 | } |