microblaze: don't use copy_file_range syscall with kernel headers < 4.10

copy_file_range syscall was added for microblaze in 4.10.

This patch makes the MicroBlaze kernel-features.h undefine
__ASSUME_COPY_FILE_RANGE for toolchains built with kernel headers < 4.10.

	* sysdeps/unix/sysv/linux/microblaze/kernel-features.h
	(__ASSUME_COPY_FILE_RANGE) [__LINUX_KERNEL_VERSION < 0x040A00]: Undef.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=7181e5590e5ba898804aef3ee6be7f27606e6f8b

Signed-off-by: Romain Naour <romain.naour@gmail.com>

diff --git a/ChangeLog b/ChangeLog
index 5a930a9..f156d85 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2018-01-29  Romain Naour  <romain.naour@gmail.com>  (tiny change)
+
+       * sysdeps/unix/sysv/linux/microblaze/kernel-features.h
+       (__ASSUME_COPY_FILE_RANGE) [__LINUX_KERNEL_VERSION < 0x040A00]: Undef.
+
 2018-01-29  Joseph Myers  <joseph@codesourcery.com>
 
        * scripts/build-many-glibcs.py (Context.git_checkout): Use git

diff --git a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
index e0e6483..745f899 100644 (file)
--- a/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
+++ b/sysdeps/unix/sysv/linux/microblaze/kernel-features.h
@@ -52,3 +52,8 @@
 #if __LINUX_KERNEL_VERSION < 0x040000
 # undef __ASSUME_EXECVEAT
 #endif
+
+/* Support for the copy_file_range syscall was added in 4.10.  */
+#if __LINUX_KERNEL_VERSION < 0x040A00
+# undef __ASSUME_COPY_FILE_RANGE
+#endif