Based on ionice's configure bits as of util-linux 2.33.2;

arm/aarch64, hppa, mips, sparch64 borrowed from fio 3.13;

e2k added based on corresponding kernel headers.

Michael Shigorin <mike@altlinux.org>

2019-06-20

diff -Naur sreadahead-1.0-orig/sreadahead.c sreadahead-1.0/sreadahead.c

--- sreadahead-1.0-orig/sreadahead.c	2009-01-27 22:51:46.000000000 +0300

+++ sreadahead-1.0/sreadahead.c	2019-06-20 11:10:56.807523695 +0300

@@ -35,12 +35,39 @@

 #define VERSION "1.0"

 #undef HAVE_IO_PRIO

-#if defined(__i386__)

+#if defined(__i386__) || defined(__e2k__)

 #  define HAVE_IO_PRIO

 #  define __NR_ioprio_set 289

 #elif defined(__x86_64__)

 #  define HAVE_IO_PRIO

 #  define __NR_ioprio_set 251

+#elif defined(__ia64__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 1274

+#elif defined(__alpha__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 442

+#elif defined(__powerpc__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 273

+#elif defined(__s390x__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 282

+#elif defined(__sparc__) || defined(__sparc64__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 196

+#elif defined(__hppa__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 267

+#elif defined(__sh__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 288

+#elif defined(__arm__) || defined(__mips__) || defined(__mips64__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 314

+#elif defined(__aarch64__)

+#  define HAVE_IO_PRIO

+#  define __NR_ioprio_set 30

 #else /* not fatal */

 #  warn "Architecture does not support ioprio modification"

 #endif

@@ -608,7 +635,9 @@

 int main(int argc, char **argv)

 {

 	FILE *file;

+#ifdef HAVE_IO_PRIO

 	int pid = 0;

+#endif

 	pthread_t one, two, three, four;

 	while (1) {