epoll is in linux since 2.6. epoll_init1 has been
added in 2.6.27.  There's no need to check for its
presence, including all other epoll-related syscalls.

Modern architectures don't have epoll_create(), only
epoll_create1(), so keep conditional around the former.

Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
---
 linux-user/syscall.c      | 10 ++--------
 linux-user/syscall_defs.h |  3 ---
 2 files changed, 2 insertions(+), 11 deletions(-)

diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index fad2bf3632..207c54db02 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -72,9 +72,7 @@
 #ifdef CONFIG_EVENTFD
 #include <sys/eventfd.h>
 #endif
-#ifdef CONFIG_EPOLL
 #include <sys/epoll.h>
-#endif
 #ifdef CONFIG_ATTR
 #include "qemu/xattr.h"
 #endif
@@ -13558,16 +13556,13 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
     case TARGET_NR_signalfd:
         return do_signalfd4(arg1, arg2, 0);
 #endif
-#if defined(CONFIG_EPOLL)
+
 #if defined(TARGET_NR_epoll_create)
     case TARGET_NR_epoll_create:
         return get_errno(epoll_create(arg1));
 #endif
-#if defined(TARGET_NR_epoll_create1) && defined(CONFIG_EPOLL_CREATE1)
     case TARGET_NR_epoll_create1:
         return get_errno(epoll_create1(target_to_host_bitmask(arg1, fcntl_flags_tbl)));
-#endif
-#if defined(TARGET_NR_epoll_ctl)
     case TARGET_NR_epoll_ctl:
     {
         struct epoll_event ep;
@@ -13596,7 +13591,6 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
         }
         return get_errno(epoll_ctl(arg1, arg2, arg3, epp));
     }
-#endif
 
 #if defined(TARGET_NR_epoll_wait)
     case TARGET_NR_epoll_wait:
@@ -13682,7 +13676,7 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1,
         g_free(ep);
         return ret;
     }
-#endif /* CONFIG_EPOLL */
+
 #ifdef TARGET_NR_prlimit64
     case TARGET_NR_prlimit64:
     {
diff --git a/linux-user/syscall_defs.h b/linux-user/syscall_defs.h
index cd9ff709b8..20e2e7deac 100644
--- a/linux-user/syscall_defs.h
+++ b/linux-user/syscall_defs.h
@@ -2595,7 +2595,6 @@ struct target_drm_i915_getparam {
 #define FUTEX_CLOCK_REALTIME    256
 #define FUTEX_CMD_MASK          ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
 
-#ifdef CONFIG_EPOLL
 #if defined(TARGET_X86_64)
 #define TARGET_EPOLL_PACKED QEMU_PACKED
 #else
@@ -2616,8 +2615,6 @@ struct target_epoll_event {
 
 #define TARGET_EP_MAX_EVENTS (INT_MAX / sizeof(struct target_epoll_event))
 
-#endif
-
 struct target_ucred {
     abi_uint pid;
     abi_uint uid;
-- 
2.47.3

On 1/14/26 00:00, Michael Tokarev wrote:
> epoll is in linux since 2.6. epoll_init1 has been
> added in 2.6.27.  There's no need to check for its
> presence, including all other epoll-related syscalls.
> 
> Modern architectures don't have epoll_create(), only
> epoll_create1(), so keep conditional around the former.
> 
> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
> ---
>   linux-user/syscall.c      | 10 ++--------
>   linux-user/syscall_defs.h |  3 ---
>   2 files changed, 2 insertions(+), 11 deletions(-)

glibc 2.9 for epoll_create1; 2.3.2 for the others.

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>


r~