diff options
Diffstat (limited to 'config/kernel-rw.m4')
| -rw-r--r-- | config/kernel-rw.m4 | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/config/kernel-rw.m4 b/config/kernel-rw.m4 new file mode 100644 index 000000000..23c14b70f --- /dev/null +++ b/config/kernel-rw.m4 @@ -0,0 +1,57 @@ +dnl # +dnl # 4.14 API change +dnl # kernel_write() which was introduced in 3.9 was updated to take +dnl # the offset as a pointer which is needed by vn_rdwr(). +dnl # +AC_DEFUN([SPL_AC_KERNEL_WRITE], [ + AC_MSG_CHECKING([whether kernel_write() takes loff_t pointer]) + tmp_flags="$EXTRA_KCFLAGS" + EXTRA_KCFLAGS="-Werror" + SPL_LINUX_TRY_COMPILE([ + #include <linux/fs.h> + ],[ + struct file *file = NULL; + const void *buf = NULL; + size_t count = 0; + loff_t *pos = NULL; + ssize_t ret; + + ret = kernel_write(file, buf, count, pos); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_KERNEL_WRITE_PPOS, 1, + [kernel_write() take loff_t pointer]) + ],[ + AC_MSG_RESULT(no) + ]) + EXTRA_KCFLAGS="$tmp_flags" +]) + +dnl # +dnl # 4.14 API change +dnl # kernel_read() which has existed for forever was updated to take +dnl # the offset as a pointer which is needed by vn_rdwr(). +dnl # +AC_DEFUN([SPL_AC_KERNEL_READ], [ + AC_MSG_CHECKING([whether kernel_read() takes loff_t pointer]) + tmp_flags="$EXTRA_KCFLAGS" + EXTRA_KCFLAGS="-Werror" + SPL_LINUX_TRY_COMPILE([ + #include <linux/fs.h> + ],[ + struct file *file = NULL; + void *buf = NULL; + size_t count = 0; + loff_t *pos = NULL; + ssize_t ret; + + ret = kernel_read(file, buf, count, pos); + ],[ + AC_MSG_RESULT(yes) + AC_DEFINE(HAVE_KERNEL_READ_PPOS, 1, + [kernel_read() take loff_t pointer]) + ],[ + AC_MSG_RESULT(no) + ]) + EXTRA_KCFLAGS="$tmp_flags" +]) |