tools: Update context analysis macros in compiler_types.h

In sync with the main kernel headers, include a stub version of
compiler-context-analysis.h in tools/include/linux/compiler_types.h and
remove the sparse context tracking definitions.

Since tools/ headers are generally self-contained, provide a standalone
tools/include/linux/compiler-context-analysis.h with no-op stubs for now. Also
clean up redundant stubs in tools/testing/shared/linux/kernel.h that are now
redundant.

This fixes build errors in tools/testing/radix-tree/ where headers from
include/linux/ (like cleanup.h) are used directly and expect these
macros to be defined:

| cc -I../shared -I. -I../../include -I../../arch/x86/include -I../../../lib -g -Og -Wall -D_LGPL_SOURCE -fsanitize=address -fsanitize=undefined    -c -o radix-tree.o radix-tree.c
| In file included from ../shared/linux/cleanup.h:2,
|                  from ../shared/linux/../../../../include/linux/idr.h:18,
|                  from ../shared/linux/idr.h:5,
|                  from radix-tree.c:18:
| ../shared/linux/../../../../include/linux/idr.h: In function ‘class_idr_alloc_destructor’:
| ../shared/linux/../../../../include/linux/cleanup.h:283:9: error: expected declaration specifiers before ‘__no_context_analysis’
|   283 |         __no_context_analysis                                           \
|       |         ^~~~~~~~~~~~~~~~~~~~~

Closes: https://lore.kernel.org/oe-lkp/202601261546.d7ae2447-lkp@intel.com
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Marco Elver <elver@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Tested-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Link: https://patch.msgid.link/20260127111428.3747328-1-elver@google.com

diff --git a/tools/include/linux/compiler-context-analysis.h b/tools/include/linux/compiler-context-analysis.h
new file mode 100644 (file)
index 0000000..13a9115
--- /dev/null
+++ b/tools/include/linux/compiler-context-analysis.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _TOOLS_LINUX_COMPILER_CONTEXT_ANALYSIS_H
+#define _TOOLS_LINUX_COMPILER_CONTEXT_ANALYSIS_H
+
+/*
+ * Macros and attributes for compiler-based static context analysis.
+ * No-op stubs for tools.
+ */
+
+#define __guarded_by(...)
+#define __pt_guarded_by(...)
+
+#define context_lock_struct(name, ...) struct __VA_ARGS__ name
+
+#define __no_context_analysis
+#define __context_unsafe(comment)
+#define context_unsafe(...)            ({ __VA_ARGS__; })
+#define context_unsafe_alias(p)
+#define disable_context_analysis()
+#define enable_context_analysis()
+
+#define __must_hold(...)
+#define __must_not_hold(...)
+#define __acquires(...)
+#define __cond_acquires(ret, x)
+#define __releases(...)
+#define __acquire(x)                   (void)0
+#define __release(x)                   (void)0
+
+#define __must_hold_shared(...)
+#define __acquires_shared(...)
+#define __cond_acquires_shared(ret, x)
+#define __releases_shared(...)
+#define __acquire_shared(x)            (void)0
+#define __release_shared(x)            (void)0
+
+#define __acquire_ret(call, expr)      (call)
+#define __acquire_shared_ret(call, expr) (call)
+#define __acquires_ret
+#define __acquires_shared_ret
+
+#endif /* _TOOLS_LINUX_COMPILER_CONTEXT_ANALYSIS_H */

diff --git a/tools/include/linux/compiler_types.h b/tools/include/linux/compiler_types.h
index 067a5b4e0f7b2751fdfff53812afbd1936181668..14e420467eee860c273a01e564af8378e1a96858 100644 (file)
--- a/tools/include/linux/compiler_types.h
+++ b/tools/include/linux/compiler_types.h
@@ -13,21 +13,7 @@
 #define __has_builtin(x) (0)
 #endif
 
-#ifdef __CHECKER__
-/* context/locking */
-# define __must_hold(x)        __attribute__((context(x,1,1)))
-# define __acquires(x) __attribute__((context(x,0,1)))
-# define __releases(x) __attribute__((context(x,1,0)))
-# define __acquire(x)  __context__(x,1)
-# define __release(x)  __context__(x,-1)
-#else /* __CHECKER__ */
-/* context/locking */
-# define __must_hold(x)
-# define __acquires(x)
-# define __releases(x)
-# define __acquire(x)  (void)0
-# define __release(x)  (void)0
-#endif /* __CHECKER__ */
+#include <linux/compiler-context-analysis.h>
 
 /* Compiler specific macros. */
 #ifdef __GNUC__

diff --git a/tools/testing/shared/linux/kernel.h b/tools/testing/shared/linux/kernel.h
index c0a2bb785b92b41f2f734afa39661adcde51a433..dc2b4ccfb185c00ff772964ff283b320c304aa2b 100644 (file)
--- a/tools/testing/shared/linux/kernel.h
+++ b/tools/testing/shared/linux/kernel.h
@@ -21,9 +21,5 @@
 #define schedule()
 #define PAGE_SHIFT     12
 
-#define __acquires(x)
-#define __releases(x)
-#define __must_hold(x)
-
 #define EXPORT_PER_CPU_SYMBOL_GPL(x)
 #endif /* _KERNEL_H */