include/linux/bsearch.h

#ifndef _LINUX_BSEARCH_H
#define _LINUX_BSEARCH_H

#include <linux/types.h>

void *bsearch(const void *key, const void *base, size_t num, size_t size,
	      int (*cmp)(const void *key, const void *elt));

#endif /* _LINUX_BSEARCH_H */
lib: Add generic binary search function to the kernel. There a large number hand-coded binary searches in the kernel (run "git grep search \| grep binary" to find many of them). Since in my experience, hand-coding binary searches can be error-prone, it seems worth cleaning this up by providing a generic binary search function. This generic binary search implementation comes from Ksplice. It has the same basic API as the C library bsearch() function. Ksplice uses it in half a dozen places with 4 different comparison functions, and I think our code is substantially cleaner because of this. Signed-off-by: Tim Abbott <tabbott@ksplice.com> Extra-bikeshedding-by: Alan Jenkins <alan-jenkins@tuffmail.co.uk> Extra-bikeshedding-by: André Goddard Rosa <andre.goddard@gmail.com> Extra-bikeshedding-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Alessio Igor Bogani <abogani@kernel.org> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> 2011-04-14 20:00:19 +02:00			`#ifndef _LINUX_BSEARCH_H`
			`#define _LINUX_BSEARCH_H`

			`#include <linux/types.h>`

			`void bsearch(const void key, const void *base, size_t num, size_t size,`
			`int (cmp)(const void key, const void *elt));`

			`#endif /* _LINUX_BSEARCH_H */`