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Subject[PATCH] compiler.h: avoid escaped section names
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The stringification operator, `#`, in the preprocessor escapes strings.
For example, `# "foo"` becomes `"\"foo\""`. GCC and Clang differ in how
they treat section names that contain \".

The portable solution is to not use a string literal with the
preprocessor stringification operator.

In this case, since __section unconditionally uses the stringification
operator, we actually want the more verbose
__attribute__((__section__())).

Link: https://bugs.llvm.org/show_bug.cgi?id=42950
Fixes: commit e04462fb82f8 ("Compiler Attributes: remove uses of __attribute__ from compiler.h")
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
---
include/linux/compiler.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/compiler.h b/include/linux/compiler.h
index 92ef163a7479..ac45f6d40d39 100644
--- a/include/linux/compiler.h
+++ b/include/linux/compiler.h
@@ -155,7 +155,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val,
extern typeof(sym) sym; \
static const unsigned long __kentry_##sym \
__used \
- __section("___kentry" "+" #sym ) \
+ __attribute__((__section__("___kentry+" #sym))) \
= (unsigned long)&sym;
#endif

--
2.28.0.709.gb0816b6eb0-goog
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