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As of GCC 4.6, specific kernel 2.6.32 header files do not compile cleanly without warnings. One specific example of this is the arch/x86/include/asm/percpu.h file. Thus, a few of the configure tests were getting hung up on this and the '-Wno-unsued-but-set-variables' compile option had to be introduced. Signed-off-by: Prakash Surya <surya1@llnl.gov> Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #459
26 lines
801 B
Plaintext
26 lines
801 B
Plaintext
dnl #
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dnl # 2.6.31 API change
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dnl # Request queue peek/retrieval interface cleanup, the blk_fetch_request()
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dnl # function replaces the elv_next_request() and blk_fetch_request()
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dnl # functions. The updated blk_fetch_request() function returns the
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dnl # next available request and removed it from the request queue.
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_BLK_FETCH_REQUEST], [
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AC_MSG_CHECKING([whether blk_fetch_request() is available])
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tmp_flags="$EXTRA_KCFLAGS"
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EXTRA_KCFLAGS="-Wno-unused-but-set-variable"
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/blkdev.h>
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],[
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struct request_queue *q = NULL;
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(void) blk_fetch_request(q);
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_BLK_FETCH_REQUEST, 1,
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[blk_fetch_request() is available])
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],[
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AC_MSG_RESULT(no)
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])
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EXTRA_KCFLAGS="$tmp_flags"
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])
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