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f325d76e96
Macro ZFS_MINOR, introduced in commit a6cc9756 to record the chosen
static minor number for /dev/zfs, conflicts with an existing macro
in Lustre. The lustre macro (along with _MAJOR, _PATCH, _FIX) is
used to record the zfsonlinux version Lustre is being built against.
Since the Lustre macro came first, and is used in past versions of
lustre at least going back to 2.10, it makes sense to rename the
macro in ZFS instead of doing so in Lustre which would require
backporting the patch.
Reviewed-by: Giuseppe Di Natale <guss80@gmail.com>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Olaf Faaland <faaland1@llnl.gov>
Closes #8195
27 lines
878 B
Plaintext
27 lines
878 B
Plaintext
dnl #
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dnl # Determine an available miscellaneous minor number which can be used
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dnl # for the /dev/zfs device. This is needed because kernel module
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dnl # auto-loading depends on registering a reserved non-conflicting minor
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dnl # number. Start with a large known available unreserved minor and work
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dnl # our way down to lower value if a collision is detected.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_MISC_MINOR], [
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AC_MSG_CHECKING([for available /dev/zfs minor])
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for i in $(seq 249 -1 200); do
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if ! grep -q "^#define\s\+.*_MINOR\s\+.*$i" \
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${LINUX}/include/linux/miscdevice.h; then
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ZFS_DEVICE_MINOR="$i"
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AC_MSG_RESULT($ZFS_DEVICE_MINOR)
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AC_DEFINE_UNQUOTED([ZFS_DEVICE_MINOR],
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[$ZFS_DEVICE_MINOR], [/dev/zfs minor])
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break
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fi
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done
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AS_IF([ test -z "$ZFS_DEVICE_MINOR"], [
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AC_MSG_ERROR([
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*** No available misc minor numbers available for use.])
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])
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])
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