[xen staging] Kbuild: simplify as-insn a little

[patchbot@xxxxxxx]

commit 5daf46b439454921c19ca30840bb39424b36444b
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Thu Mar 7 09:15:17 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Thu Mar 7 09:15:17 2024 +0100

    Kbuild: simplify as-insn a little
    
    As of 732571959f17 ("xen/build: use new $(c_flags) and $(a_flags)
    instead of $(CFLAGS)") -M options aren't part of CFLAGS anymore, and
    c_flags isn't supposed to be passed to this macro. Drop the now dead
    part of filtering.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
 xen/scripts/Kbuild.include | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/scripts/Kbuild.include b/xen/scripts/Kbuild.include
index c2bd8498e1..c2e4ec811b 100644
--- a/xen/scripts/Kbuild.include
+++ b/xen/scripts/Kbuild.include
@@ -59,7 +59,7 @@ endef
 # as-insn: Check whether assembler supports an instruction.
 # Usage: cflags-y += $(call as-insn,CC FLAGS,"insn",option-yes,option-no)
 as-insn = $(if $(shell echo 'void _(void) { asm volatile ( $(2) ); }' \
-                       | $(filter-out -M% %.d -include 
%/include/xen/config.h,$(1)) \
+                       | $(filter-out -include %/include/xen/config.h,$(1)) \
                               -c -x c -o /dev/null - 2>&1),$(4),$(3))
 
 # as-option-add: Conditionally add options to flags
--
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