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Update kernel-features.h files for Linux 5.1

From: Joseph Myers <joseph at codesourcery dot com>
To: <libc-alpha at sourceware dot org>
Date: Thu, 9 May 2019 23:00:37 +0000
Subject: Update kernel-features.h files for Linux 5.1
Linux 5.1 adds missing syscalls to the syscall table for many Linux
kernel architectures.  This patch updates the kernel-features.h
headers accordingly.  I believe the statfs64 structure used by alpha
matches what the new kernel syscalls use, but that should be reviewed
carefully.

Tested with build-many-glibcs.py.

2019-05-09  Joseph Myers  <joseph@codesourcery.com>

	* sysdeps/unix/sysv/linux/alpha/kernel-features.h
	(__ASSUME_STATFS64): Only undefine if [__LINUX_KERNEL_VERSION <
	0x050100].
	* sysdeps/unix/sysv/linux/i386/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
	* sysdeps/unix/sysv/linux/ia64/kernel-features.h (__ASSUME_STATX):
	Likewise.
	* sysdeps/unix/sysv/linux/m68k/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
	* sysdeps/unix/sysv/linux/mips/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
	* sysdeps/unix/sysv/linux/s390/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
	* sysdeps/unix/sysv/linux/sh/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.
	(__ASSUME_STATX): Likewise.
	* sysdeps/unix/sysv/linux/sparc/kernel-features.h
	(__ASSUME_DIRECT_SYSVIPC_SYSCALLS): Likewise.

diff --git a/sysdeps/unix/sysv/linux/alpha/kernel-features.h b/sysdeps/unix/sysv/linux/alpha/kernel-features.h
index f3298b234e..4a5d029c1d 100644
--- a/sysdeps/unix/sysv/linux/alpha/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/alpha/kernel-features.h
@@ -22,9 +22,11 @@
 
 #include_next <kernel-features.h>
 
-/* There never has been support for fstat64.  */
-#undef __ASSUME_STATFS64
-#define __ASSUME_STATFS64 0
+/* Support for statfs64 was added in 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_STATFS64
+# define __ASSUME_STATFS64 0
+#endif
 
 /* Alpha used to define SysV ipc shmat syscall with a different name.  */
 #ifndef __NR_shmat
diff --git a/sysdeps/unix/sysv/linux/i386/kernel-features.h b/sysdeps/unix/sysv/linux/i386/kernel-features.h
index 3ac725b5a2..8610651346 100644
--- a/sysdeps/unix/sysv/linux/i386/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/i386/kernel-features.h
@@ -43,8 +43,10 @@
 # undef __ASSUME_SENDTO_SYSCALL
 #endif
 
-/* i686 only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* i686 only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#endif
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS	1
diff --git a/sysdeps/unix/sysv/linux/ia64/kernel-features.h b/sysdeps/unix/sysv/linux/ia64/kernel-features.h
index 0f4948b8e0..333947931d 100644
--- a/sysdeps/unix/sysv/linux/ia64/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/ia64/kernel-features.h
@@ -26,8 +26,10 @@
 #define __ASSUME_SEND_SYSCALL		1
 #define __ASSUME_ACCEPT4_SYSCALL	1
 
-/* No statx system call on ia64 yet.  */
-#undef __ASSUME_STATX
+/* Support for statx was added in 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_STATX
+#endif
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE2
diff --git a/sysdeps/unix/sysv/linux/m68k/kernel-features.h b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
index 1976724362..1467474b8a 100644
--- a/sysdeps/unix/sysv/linux/m68k/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/m68k/kernel-features.h
@@ -50,5 +50,7 @@
 # undef __ASSUME_SET_ROBUST_LIST
 #endif
 
-/* m68k only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* m68k only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#endif
diff --git a/sysdeps/unix/sysv/linux/mips/kernel-features.h b/sysdeps/unix/sysv/linux/mips/kernel-features.h
index c341c3fa10..8114090913 100644
--- a/sysdeps/unix/sysv/linux/mips/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/mips/kernel-features.h
@@ -31,8 +31,10 @@
    pairs to start with an even-number register.  */
 #if _MIPS_SIM == _ABIO32
 # define __ASSUME_ALIGNED_REGISTER_PAIRS	1
-/* mips32 only supports ipc syscall.  */
-# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* mips32 only supports ipc syscall before 5.1.  */
+# if __LINUX_KERNEL_VERSION < 0x050100
+#  undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+# endif
 
 /* The o32 MIPS fadvise64 syscall behaves as fadvise64_64.  */
 # define __ASSUME_FADVISE64_AS_64_64		1
diff --git a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
index 413a185db3..5924534c22 100644
--- a/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/powerpc/kernel-features.h
@@ -44,8 +44,10 @@
 
 #include_next <kernel-features.h>
 
-/* powerpc only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* powerpc only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#endif
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS	1
diff --git a/sysdeps/unix/sysv/linux/s390/kernel-features.h b/sysdeps/unix/sysv/linux/s390/kernel-features.h
index 8fdf38c454..dcbf1c7c53 100644
--- a/sysdeps/unix/sysv/linux/s390/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/s390/kernel-features.h
@@ -45,8 +45,10 @@
 # undef __ASSUME_SENDTO_SYSCALL
 #endif
 
-/* s390 only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* s390 only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#endif
 
 #undef __ASSUME_CLONE_DEFAULT
 #define __ASSUME_CLONE_BACKWARDS2
diff --git a/sysdeps/unix/sysv/linux/sh/kernel-features.h b/sysdeps/unix/sysv/linux/sh/kernel-features.h
index 767df721b8..8532cccadd 100644
--- a/sysdeps/unix/sysv/linux/sh/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/sh/kernel-features.h
@@ -41,8 +41,10 @@
    before the offset.  */
 #define __ASSUME_PRW_DUMMY_ARG	1
 
-/* sh only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* sh only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#endif
 
 /* Support for several syscalls was added in 4.8.  */
 #if __LINUX_KERNEL_VERSION < 0x040800
@@ -52,7 +54,9 @@
 # undef __ASSUME_COPY_FILE_RANGE
 #endif
 
-/* sh does not support the statx system call.  */
-#undef __ASSUME_STATX
+/* sh does not support the statx system call before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_STATX
+#endif
 
 #endif
diff --git a/sysdeps/unix/sysv/linux/sparc/kernel-features.h b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
index f441bd811d..7b5db4af17 100644
--- a/sysdeps/unix/sysv/linux/sparc/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/sparc/kernel-features.h
@@ -58,8 +58,10 @@
 # undef __NR_pause
 #endif
 
-/* sparc only supports ipc syscall.  */
-#undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+/* sparc only supports ipc syscall before 5.1.  */
+#if __LINUX_KERNEL_VERSION < 0x050100
+# undef __ASSUME_DIRECT_SYSVIPC_SYSCALLS
+#endif
 
 /* Support for the renameat2 syscall was added in 3.16.  */
 #if __LINUX_KERNEL_VERSION < 0x031000

-- 
Joseph S. Myers
joseph@codesourcery.com
Follow-Ups:
- Re: Update kernel-features.h files for Linux 5.1
  - From: Stepan Golosunov
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