This patch adds a new autoconf function: ZFS_LINUX_TRY_COMPILE_SYMBOL.
This new function does the following:
- Call LINUX_TRY_COMPILE with the specified parameters.
- If unsuccessful, return false.
- If successful and we're configuring with --enable-linux-builtin,
return true.
- Else, call CHECK_SYMBOL_EXPORT with the specified parameters and
return the result.
All calls to CHECK_SYMBOL_EXPORT are converted to
LINUX_TRY_COMPILE_SYMBOL so that the tests work even when configuring
for builtin on a kernel which doesn't have loadable module support, or
hasn't been built yet.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #851
The open_bdev_exclusive() function has been replaced (again) by the
more generic blkdev_get_by_path() function. Additionally, the
counterpart function close_bdev_exclusive() has been replaced by
blkdev_put(). Because these functions are more generic versions
of the functions they replaced the compatibility macro must add
the FMODE_EXCL mask to ensure they are exclusive.
Closes#114
