hurd: Use __hurd_fail () instead of assigning errno

The __hurd_fail () inline function is the dedicated, idiomatic way of
reporting errors in the Hurd part of glibc. Not only is it more concise
than '{ errno = err; return -1; }', it is since commit
6639cc10029e24e06b34e169712b21c31b8cf213
"hurd: Mark error functions as __COLD" marked with the cold attribute,
telling the compiler that this codepath is unlikely to be executed.

In one case, use __hurd_dfail () over the plain __hurd_fail ().

Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
Message-Id: <20230520115531.3911877-1-bugaevc@gmail.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/sysdeps/mach/hurd/ptrace.c b/sysdeps/mach/hurd/ptrace.c
index b2efac0722..97948d3fac 100644
--- a/sysdeps/mach/hurd/ptrace.c
+++ b/sysdeps/mach/hurd/ptrace.c
@@ -380,8 +380,7 @@ ptrace (enum __ptrace_request request, ... )
       }
 
     default:
-      errno = EINVAL;
-      return -1;
+      return __hurd_fail (EINVAL);
     }
 
   return 0;