589f59b52a
Linux since 4.7 makes interface 'cpu_has_feature' to use jump labels on powerpc if CONFIG_JUMP_LABEL_FEATURE_CHECKS is enabled, in this case however the inline function references GPL-only symbol 'cpu_feature_keys'. ZFS currently uses 'cpu_has_feature' either directly or indirectly from several places; while it is unknown how this issue didn't break ZFS on 64-bit little-endian powerpc, it is known to break ZFS with many Linux versions on both 32-bit and 64-bit big-endian powerpc. Until this issue is fixed in Linux, we have to workaround it by overriding affected inline functions without depending on 'cpu_feature_keys'. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: WHR <msl0000023508@gmail.com> Closes #14590
30 lines
788 B
Plaintext
30 lines
788 B
Plaintext
dnl #
|
|
dnl # cpu_has_feature() may referencing GPL-only cpu_feature_keys on powerpc
|
|
dnl #
|
|
|
|
dnl #
|
|
dnl # Checking if cpu_has_feature is exported GPL-only
|
|
dnl #
|
|
AC_DEFUN([ZFS_AC_KERNEL_SRC_CPU_HAS_FEATURE], [
|
|
ZFS_LINUX_TEST_SRC([cpu_has_feature], [
|
|
#include <linux/version.h>
|
|
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 7, 0)
|
|
#include <asm/cpu_has_feature.h>
|
|
#else
|
|
#include <asm/cputable.h>
|
|
#endif
|
|
], [
|
|
return cpu_has_feature(CPU_FTR_ALTIVEC) ? 0 : 1;
|
|
], [], [ZFS_META_LICENSE])
|
|
])
|
|
AC_DEFUN([ZFS_AC_KERNEL_CPU_HAS_FEATURE], [
|
|
AC_MSG_CHECKING([whether cpu_has_feature() is GPL-only])
|
|
ZFS_LINUX_TEST_RESULT([cpu_has_feature_license], [
|
|
AC_MSG_RESULT(no)
|
|
], [
|
|
AC_MSG_RESULT(yes)
|
|
AC_DEFINE(HAVE_CPU_HAS_FEATURE_GPL_ONLY, 1,
|
|
[cpu_has_feature() is GPL-only])
|
|
])
|
|
])
|