dnl # dnl # Handle differences in kernel FPU code. dnl # dnl # Kernel dnl # 5.11: kernel_fpu_begin() is an inlined function now, so don't check dnl # for it inside the kernel symbols. dnl # dnl # 5.0: Wrappers have been introduced to save/restore the FPU state. dnl # This change was made to the 4.19.38 and 4.14.120 LTS kernels. dnl # HAVE_KERNEL_FPU_INTERNAL dnl # dnl # 4.2: Use __kernel_fpu_{begin,end}() dnl # HAVE_UNDERSCORE_KERNEL_FPU & KERNEL_EXPORTS_X86_FPU dnl # dnl # Pre-4.2: Use kernel_fpu_{begin,end}() dnl # HAVE_KERNEL_FPU & KERNEL_EXPORTS_X86_FPU dnl # dnl # N.B. The header check is performed before all other checks since it dnl # depends on HAVE_KERNEL_FPU_API_HEADER being set in confdefs.h. dnl # AC_DEFUN([ZFS_AC_KERNEL_FPU_HEADER], [ AC_MSG_CHECKING([whether fpu headers are available]) ZFS_LINUX_TRY_COMPILE([ #include #include ],[ ],[ AC_DEFINE(HAVE_KERNEL_FPU_API_HEADER, 1, [kernel has asm/fpu/api.h]) AC_MSG_RESULT(asm/fpu/api.h) ],[ AC_MSG_RESULT(i387.h) ]) ]) AC_DEFUN([ZFS_AC_KERNEL_SRC_FPU], [ ZFS_LINUX_TEST_SRC([kernel_fpu], [ #include #ifdef HAVE_KERNEL_FPU_API_HEADER #include #include #else #include #endif ], [ kernel_fpu_begin(); kernel_fpu_end(); ], [], [ZFS_META_LICENSE]) ZFS_LINUX_TEST_SRC([__kernel_fpu], [ #include #ifdef HAVE_KERNEL_FPU_API_HEADER #include #include #else #include #endif ], [ __kernel_fpu_begin(); __kernel_fpu_end(); ], [], [ZFS_META_LICENSE]) ]) AC_DEFUN([ZFS_AC_KERNEL_FPU], [ dnl # dnl # Legacy kernel dnl # AC_MSG_CHECKING([whether kernel fpu is available]) ZFS_LINUX_TEST_RESULT([kernel_fpu_license], [ AC_MSG_RESULT(kernel_fpu_*) AC_DEFINE(HAVE_KERNEL_FPU, 1, [kernel has kernel_fpu_* functions]) AC_DEFINE(KERNEL_EXPORTS_X86_FPU, 1, [kernel exports FPU functions]) ],[ dnl # dnl # Linux 4.2 kernel dnl # ZFS_LINUX_TEST_RESULT_SYMBOL([__kernel_fpu_license], [__kernel_fpu_begin], [arch/x86/kernel/fpu/core.c arch/x86/kernel/i387.c], [ AC_MSG_RESULT(__kernel_fpu_*) AC_DEFINE(HAVE_UNDERSCORE_KERNEL_FPU, 1, [kernel has __kernel_fpu_* functions]) AC_DEFINE(KERNEL_EXPORTS_X86_FPU, 1, [kernel exports FPU functions]) ],[ AC_MSG_RESULT(internal) AC_DEFINE(HAVE_KERNEL_FPU_INTERNAL, 1, [kernel fpu internal]) ]) ]) ])