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705741827a
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
19 lines
506 B
Plaintext
19 lines
506 B
Plaintext
dnl #
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dnl # 2.6.28 API change
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dnl # open/close_bdev_excl() renamed to open/close_bdev_exclusive()
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_OPEN_BDEV_EXCLUSIVE],
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[AC_MSG_CHECKING([whether open_bdev_exclusive() is available])
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ZFS_LINUX_TRY_COMPILE_SYMBOL([
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#include <linux/fs.h>
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], [
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open_bdev_exclusive(NULL, 0, NULL);
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], [open_bdev_exclusive], [fs/block_dev.c], [
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_OPEN_BDEV_EXCLUSIVE, 1,
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[open_bdev_exclusive() is available])
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], [
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AC_MSG_RESULT(no)
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])
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])
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