[xen master] xen: Use __has_include() in xen/percpu.h

[patchbot@xxxxxxx]

commit 6bdb8d45b749a4f376d0380ff9503162b14b8468
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Wed Sep 9 11:59:09 2026 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Fri Sep 11 18:24:25 2026 +0100

    xen: Use __has_include() in xen/percpu.h
    
    Only x86 has an asm/percpu.h.  Have the compiler only include it if it's
    present, rather than symlinking an empty file.
    
    No functional change.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
    Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
---
 xen/arch/arm/include/asm/Makefile   |  1 -
 xen/arch/ppc/include/asm/Makefile   |  1 -
 xen/arch/riscv/include/asm/Makefile |  1 -
 xen/include/asm-generic/percpu.h    | 14 --------------
 xen/include/xen/percpu.h            |  4 +++-
 5 files changed, 3 insertions(+), 18 deletions(-)

diff --git a/xen/arch/arm/include/asm/Makefile 
b/xen/arch/arm/include/asm/Makefile
index 4565baca6a..a78a498eb5 100644
--- a/xen/arch/arm/include/asm/Makefile
+++ b/xen/arch/arm/include/asm/Makefile
@@ -5,7 +5,6 @@ generic-y += hardirq.h
 generic-y += iocap.h
 generic-y += irq-dt.h
 generic-y += paging.h
-generic-y += percpu.h
 generic-y += random.h
 generic-y += softirq.h
 generic-y += vm_event.h
diff --git a/xen/arch/ppc/include/asm/Makefile 
b/xen/arch/ppc/include/asm/Makefile
index c989a7f89b..a5c46704cc 100644
--- a/xen/arch/ppc/include/asm/Makefile
+++ b/xen/arch/ppc/include/asm/Makefile
@@ -6,7 +6,6 @@ generic-y += hardirq.h
 generic-y += hypercall.h
 generic-y += iocap.h
 generic-y += paging.h
-generic-y += percpu.h
 generic-y += perfc_defn.h
 generic-y += random.h
 generic-y += softirq.h
diff --git a/xen/arch/riscv/include/asm/Makefile 
b/xen/arch/riscv/include/asm/Makefile
index 86c56251d5..d348369927 100644
--- a/xen/arch/riscv/include/asm/Makefile
+++ b/xen/arch/riscv/include/asm/Makefile
@@ -6,7 +6,6 @@ generic-y += hardirq.h
 generic-y += hypercall.h
 generic-y += iocap.h
 generic-y += irq-dt.h
-generic-y += percpu.h
 generic-y += random.h
 generic-y += softirq.h
 generic-y += vm_event.h
diff --git a/xen/include/asm-generic/percpu.h b/xen/include/asm-generic/percpu.h
deleted file mode 100644
index 3fdb3a2a02..0000000000
--- a/xen/include/asm-generic/percpu.h
+++ /dev/null
@@ -1,14 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-#ifndef __ASM_GENERIC_PERCPU_H__
-#define __ASM_GENERIC_PERCPU_H__
-
-#endif /* __ASM_GENERIC_PERCPU_H__ */
-
-/*
- * Local variables:
- * mode: C
- * c-file-style: "BSD"
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- */
diff --git a/xen/include/xen/percpu.h b/xen/include/xen/percpu.h
index 30609f49f0..d324671b5b 100644
--- a/xen/include/xen/percpu.h
+++ b/xen/include/xen/percpu.h
@@ -27,7 +27,9 @@
 
 #define get_per_cpu_var(var)  (per_cpu__##var)
 
-#include <asm/percpu.h>
+#if __has_include(<asm/percpu.h>)
+# include <asm/percpu.h>
+#endif
 
 #ifndef __ASSEMBLER__
 
--
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