[Stable-9.2.2,04/14] linux-user: Do not define struct sched_attr if libc headers do

Commit Message

Michael Tokarev Feb. 21, 2025, 5:49 p.m. UTC

From: Khem Raj <[e-mail]>

glibc 2.41+ has added [1] definitions for sched_setattr and
sched_getattr functions and struct sched_attr.  Therefore, it needs
to be checked for here as well before defining sched_attr, to avoid
a compilation failure.

Define sched_attr conditionally only when SCHED_ATTR_SIZE_VER0 is
not defined.

[1] https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=21571ca0d70302909cf72707b2a7736cf12190a0;hp=298bc488fdc047da37482f4003023cb9adef78f8

Signed-off-by: Khem Raj <[e-mail]>
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2799
Cc: [e-mail]
Reviewed-by: Peter Maydell <[e-mail]>
Signed-off-by: Peter Maydell <[e-mail]>
(cherry picked from commit 27a8d899c7a100fd5aa040a8b993bb257687c393)
Signed-off-by: Michael Tokarev <[e-mail]>

Patch

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 1ce4c79784..a407d4a023 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -358,7 +358,8 @@  _syscall3(int, sys_sched_getaffinity, pid_t, pid, unsigned int, len,
 #define __NR_sys_sched_setaffinity __NR_sched_setaffinity
 _syscall3(int, sys_sched_setaffinity, pid_t, pid, unsigned int, len,
           unsigned long *, user_mask_ptr);
-/* sched_attr is not defined in glibc */
+/* sched_attr is not defined in glibc < 2.41 */
+#ifndef SCHED_ATTR_SIZE_VER0
 struct sched_attr {
     uint32_t size;
     uint32_t sched_policy;
@@ -371,6 +372,7 @@  struct sched_attr {
     uint32_t sched_util_min;
     uint32_t sched_util_max;
 };
+#endif
 #define __NR_sys_sched_getattr __NR_sched_getattr
 _syscall4(int, sys_sched_getattr, pid_t, pid, struct sched_attr *, attr,
           unsigned int, size, unsigned int, flags);