git: 7b86b92ec1bd - stable/13 - Fix arm64 build after llvm 18.1.3 upgrade

The branch stable/13 has been updated by dim:

URL: https://cgit.FreeBSD.org/src/commit/?id=7b86b92ec1bdfad552ece3eaa28bd8d28dff9a82

commit 7b86b92ec1bdfad552ece3eaa28bd8d28dff9a82
Author:     Dimitry Andric <dim@FreeBSD.org>
AuthorDate: 2024-04-07 00:07:38 +0000
Commit:     Dimitry Andric <dim@FreeBSD.org>
CommitDate: 2024-04-20 10:29:09 +0000

    Fix arm64 build after llvm 18.1.3 upgrade
    
    Apparently clang 18 has become more strict about using floating point
    registers in inline assembly when -mgeneral-regs-only is used. This
    causes sys/arm64/arm64/vfp.c to fail to compile, with "error:
    instruction requires: fp-armv8", and "error: expected readable system
    register".
    
    To fix it, similar to other files compiled for arm64, disable
    -mgeneral-regs-only for this particular file.
    
    PR:             276104
    MFC after:      1 month
    
    (cherry picked from commit f4d93b67611f6f8b19db7bac6b0973b2ef0cfcb6)
---
 sys/conf/files.arm64 | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/sys/conf/files.arm64 b/sys/conf/files.arm64
index bb593a8f9a01..f72f5718ac19 100644
--- a/sys/conf/files.arm64
+++ b/sys/conf/files.arm64
@@ -76,7 +76,8 @@ arm64/arm64/uio_machdep.c			standard
 arm64/arm64/uma_machdep.c			standard
 arm64/arm64/undefined.c				standard
 arm64/arm64/unwind.c				optional ddb | kdtrace_hooks | stack
-arm64/arm64/vfp.c				standard
+arm64/arm64/vfp.c				standard \
+	compile-with "${NORMAL_C:N-mgeneral-regs-only}"
 arm64/arm64/vm_machdep.c			standard
 
 arm64/coresight/coresight.c			standard