[PATCH 2/5] Linux: Define MMAP_CALL_INTERNAL

[Florian Weimer <fweimer@redhat.com>]

Unlike MMAP_CALL, this avoids a TCB dependency for an errno update
on failure.

<mmap_internal.h> cannot be included as is on several architectures
due to the definition of page_unit, so introduce a separate header
file for the definition of MMAP_CALL and MMAP_CALL_INTERNAL,
 <mmap_call.h>.
---
 sysdeps/unix/sysv/linux/mmap_call.h           | 22 +++++++++++++++++++
 sysdeps/unix/sysv/linux/mmap_internal.h       |  6 +----
 .../s390/{mmap_internal.h => mmap_call.h}     | 14 ++++++------
 3 files changed, 30 insertions(+), 12 deletions(-)
 create mode 100644 sysdeps/unix/sysv/linux/mmap_call.h
 rename sysdeps/unix/sysv/linux/s390/{mmap_internal.h => mmap_call.h} (78%)

diff --git a/sysdeps/unix/sysv/linux/mmap_call.h b/sysdeps/unix/sysv/linux/mmap_call.h
new file mode 100644
index 0000000000..3547c99e14
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/mmap_call.h
@@ -0,0 +1,22 @@
+/* Generic definition of MMAP_CALL and MMAP_CALL_INTERNAL.
+   Copyright (C) 2017-2022 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
+  INLINE_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset)
+#define MMAP_CALL_INTERNAL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
+  INTERNAL_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset)
diff --git a/sysdeps/unix/sysv/linux/mmap_internal.h b/sysdeps/unix/sysv/linux/mmap_internal.h
index 841b731391..aebf97d064 100644
--- a/sysdeps/unix/sysv/linux/mmap_internal.h
+++ b/sysdeps/unix/sysv/linux/mmap_internal.h
@@ -42,10 +42,6 @@ static uint64_t page_unit;
 /* Do not accept offset not multiple of page size.  */
 #define MMAP_OFF_LOW_MASK  (MMAP2_PAGE_UNIT - 1)
 
-/* An architecture may override this.  */
-#ifndef MMAP_CALL
-# define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset) \
-  INLINE_SYSCALL_CALL (__nr, __addr, __len, __prot, __flags, __fd, __offset)
-#endif
+#include <mmap_call.h>
 
 #endif /* MMAP_INTERNAL_LINUX_H  */
diff --git a/sysdeps/unix/sysv/linux/s390/mmap_internal.h b/sysdeps/unix/sysv/linux/s390/mmap_call.h
similarity index 78%
rename from sysdeps/unix/sysv/linux/s390/mmap_internal.h
rename to sysdeps/unix/sysv/linux/s390/mmap_call.h
index cc76ac9735..f169b8bab9 100644
--- a/sysdeps/unix/sysv/linux/s390/mmap_internal.h
+++ b/sysdeps/unix/sysv/linux/s390/mmap_call.h
@@ -16,9 +16,6 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#ifndef MMAP_S390_INTERNAL_H
-# define MMAP_S390_INTERNAL_H
-
 #define MMAP_CALL(__nr, __addr, __len, __prot, __flags, __fd, __offset)	\
   ({									\
     long int __args[6] = { (long int) (__addr), (long int) (__len),	\
@@ -26,7 +23,10 @@
 			   (long int) (__fd), (long int) (__offset) };	\
     INLINE_SYSCALL_CALL (__nr, __args);					\
   })
-
-#include_next <mmap_internal.h>
-
-#endif
+#define MMAP_CALL_INTERNAL(__nr, __addr, __len, __prot, __flags, __fd, __offset)	\
+  ({									\
+    long int __args[6] = { (long int) (__addr), (long int) (__len),	\
+			   (long int) (__prot), (long int) (__flags),	\
+			   (long int) (__fd), (long int) (__offset) };	\
+    INTERNAL_SYSCALL_CALL (__nr, __args);				\
+  })
-- 
2.35.1