/usr/arm-linux-androideabi/include/asm/delay.h is in gcc-arm-linux-androideabi 0.20130705.1-0ubuntu7.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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***
*** This header was automatically generated from a Linux kernel header
*** of the same name, to make information necessary for userspace to
*** call into the kernel available to libc. It contains only constants,
*** structures, and macros generated from the original header, and thus,
*** contains no copyrightable information.
***
*** To edit the content of this header, modify the corresponding
*** source file (e.g. under external/kernel-headers/original/) then
*** run bionic/libc/kernel/tools/update_all.py
***
*** Any manual change here will be lost the next time this script will
*** be run. You've been warned!
***
****************************************************************************
****************************************************************************/
#ifndef __ASM_ARM_DELAY_H
#define __ASM_ARM_DELAY_H
#include <asm/param.h>
#define MAX_UDELAY_MS 2
/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
#define udelay(n) (__builtin_constant_p(n) ? ((n) > (MAX_UDELAY_MS * 1000) ? __bad_udelay() : __const_udelay((n) * ((2199023U*HZ)>>11))) : __udelay(n))
#endif
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