<sched.h>: Add sched_getcpu() and cpu_set_t

This adds the cpu_set_t type definition and related functions
and macros used to handle CPU thread affinity.

  sched_getcpu()
  sched_setaffinity()
  sched_getaffinity()

Change-Id: If382ecafde8926341a88478062b275553645065b

libc/arch-arm/syscalls.mk

@@ -153,6 +153,9 @@ syscall_src += arch-arm/syscalls/sched_getparam.S
 syscall_src += arch-arm/syscalls/sched_get_priority_max.S
 syscall_src += arch-arm/syscalls/sched_get_priority_min.S
 syscall_src += arch-arm/syscalls/sched_rr_get_interval.S
+syscall_src += arch-arm/syscalls/sched_setaffinity.S
+syscall_src += arch-arm/syscalls/__sched_getaffinity.S
+syscall_src += arch-arm/syscalls/__getcpu.S
 syscall_src += arch-arm/syscalls/ioprio_set.S
 syscall_src += arch-arm/syscalls/ioprio_get.S
 syscall_src += arch-arm/syscalls/uname.S

libc/arch-arm/syscalls/__getcpu.S

@@ -0,0 +1,19 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+    .text
+    .type __getcpu, #function
+    .globl __getcpu
+    .align 4
+    .fnstart
+
+__getcpu:
+    .save   {r4, r7}
+    stmfd   sp!, {r4, r7}
+    ldr     r7, =__NR_getcpu
+    swi     #0
+    ldmfd   sp!, {r4, r7}
+    movs    r0, r0
+    bxpl    lr
+    b       __set_syscall_errno
+    .fnend

libc/arch-arm/syscalls/__sched_getaffinity.S

@@ -0,0 +1,19 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+    .text
+    .type __sched_getaffinity, #function
+    .globl __sched_getaffinity
+    .align 4
+    .fnstart
+
+__sched_getaffinity:
+    .save   {r4, r7}
+    stmfd   sp!, {r4, r7}
+    ldr     r7, =__NR_sched_getaffinity
+    swi     #0
+    ldmfd   sp!, {r4, r7}
+    movs    r0, r0
+    bxpl    lr
+    b       __set_syscall_errno
+    .fnend

libc/arch-arm/syscalls/sched_setaffinity.S

@@ -0,0 +1,19 @@
+/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+
+    .text
+    .type sched_setaffinity, #function
+    .globl sched_setaffinity
+    .align 4
+    .fnstart
+
+sched_setaffinity:
+    .save   {r4, r7}
+    stmfd   sp!, {r4, r7}
+    ldr     r7, =__NR_sched_setaffinity
+    swi     #0
+    ldmfd   sp!, {r4, r7}
+    movs    r0, r0
+    bxpl    lr
+    b       __set_syscall_errno
+    .fnend