forked from luck/tmp_suning_uos_patched
3e1aa66bd4
Previously kvasprintf() allocation was being done through kmalloc(), thus producing an inaccurate trace report. This is a common problem: in order to get accurate callsite tracing, a lib/utils function shouldn't allocate kmalloc but instead use kmalloc_track_caller. Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
46 lines
717 B
C
46 lines
717 B
C
/*
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* linux/lib/kasprintf.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#include <stdarg.h>
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#include <linux/export.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/string.h>
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/* Simplified asprintf. */
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char *kvasprintf(gfp_t gfp, const char *fmt, va_list ap)
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{
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unsigned int len;
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char *p;
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va_list aq;
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va_copy(aq, ap);
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len = vsnprintf(NULL, 0, fmt, aq);
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va_end(aq);
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p = kmalloc_track_caller(len+1, gfp);
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if (!p)
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return NULL;
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vsnprintf(p, len+1, fmt, ap);
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return p;
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}
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EXPORT_SYMBOL(kvasprintf);
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char *kasprintf(gfp_t gfp, const char *fmt, ...)
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{
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va_list ap;
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char *p;
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va_start(ap, fmt);
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p = kvasprintf(gfp, fmt, ap);
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va_end(ap);
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return p;
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}
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EXPORT_SYMBOL(kasprintf);
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