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Suppress incorrect objtool warnings

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Suppress incorrect warnings from versions of objtool which are not
aware of x86 EVEX prefix instructions used for AVX512.

  module/zfs/vdev_raidz_math_avx512bw.o: warning:
  objtool: <func+offset>: can't find jump dest instruction at .text

Reviewed-by: Don Brady <don.brady@delphix.com>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #6928
This commit is contained in:
Brian Behlendorf
2017-12-07 10:28:50 -08:00
committed by GitHub
parent 674b89342e
commit c28a67733c
5 changed files with 69 additions and 1 deletions
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config/kernel-objtool.m4
+24 -1
View File
@@ -12,7 +12,30 @@ AC_DEFUN([ZFS_AC_KERNEL_OBJTOOL], [
#endif
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_KERNEL_OBJTOOL, 1, [kernel does stack verification])
AC_DEFINE(HAVE_KERNEL_OBJTOOL, 1,
[kernel does stack verification])
ZFS_AC_KERNEL_STACK_FRAME_NON_STANDARD
],[
AC_MSG_RESULT(no)
])
])
dnl #
dnl # 4.6 API added STACK_FRAME_NON_STANDARD macro
dnl #
AC_DEFUN([ZFS_AC_KERNEL_STACK_FRAME_NON_STANDARD], [
AC_MSG_CHECKING([whether STACK_FRAME_NON_STANDARD is defined])
ZFS_LINUX_TRY_COMPILE([
#include <linux/frame.h>
],[
#if !defined(STACK_FRAME_NON_STANDARD)
CTASSERT(1);
#endif
],[
AC_MSG_RESULT(yes)
AC_DEFINE(HAVE_STACK_FRAME_NON_STANDARD, 1,
[STACK_FRAME_NON_STANDARD is defined])
],[
AC_MSG_RESULT(no)
])