[xen staging] x86/cache: Drop legacy __read_mostly/__ro_after_init definitions

[patchbot@xxxxxxx]

commit afc8d7dd300aae4b45eb74970b6db91d1161e397
Author:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
AuthorDate: Fri Jun 21 20:59:46 2024 +0100
Commit:     Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
CommitDate: Mon Sep 9 14:59:05 2024 +0100

    x86/cache: Drop legacy __read_mostly/__ro_after_init definitions
    
    Lots of files were picking these up transitively, including lib.h
    
    However, lib.h needs __read_mostly for printk_once() and this has the side
    effect of kicking the transitive can down the road.
    
    Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/include/asm/cache.h | 3 ---
 xen/include/xen/cache.h          | 2 +-
 xen/include/xen/lib.h            | 1 +
 3 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/xen/arch/x86/include/asm/cache.h b/xen/arch/x86/include/asm/cache.h
index 956c05493e..f15d10dc7f 100644
--- a/xen/arch/x86/include/asm/cache.h
+++ b/xen/arch/x86/include/asm/cache.h
@@ -9,9 +9,6 @@
 #define L1_CACHE_SHIFT (CONFIG_X86_L1_CACHE_SHIFT)
 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT)
 
-/* TODO: Phase out the use of this via cache.h */
-#define __read_mostly __section(".data.read_mostly")
-
 #ifndef __ASSEMBLY__
 
 void cache_flush(const void *addr, unsigned int size);
diff --git a/xen/include/xen/cache.h b/xen/include/xen/cache.h
index a19942fd63..90816ba05b 100644
--- a/xen/include/xen/cache.h
+++ b/xen/include/xen/cache.h
@@ -15,7 +15,7 @@
 #define __cacheline_aligned __attribute__((__aligned__(SMP_CACHE_BYTES)))
 #endif
 
-#if defined(CONFIG_ARM) || defined(CONFIG_X86)
+#if defined(CONFIG_ARM)
 /* TODO: Phase out the use of this via cache.h */
 #define __ro_after_init __section(".data.ro_after_init")
 #endif
diff --git a/xen/include/xen/lib.h b/xen/include/xen/lib.h
index e884a02ee8..81b722ea3e 100644
--- a/xen/include/xen/lib.h
+++ b/xen/include/xen/lib.h
@@ -10,6 +10,7 @@
 #include <xen/types.h>
 #include <xen/xmalloc.h>
 #include <xen/string.h>
+#include <xen/sections.h>
 
 #define __ACCESS_ONCE(x) ({                             \
             (void)(typeof(x))0; /* Scalar typecheck. */ \
--
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