diff options
| author | Nick Desaulniers <[email protected]> | 2019-08-28 15:55:23 -0700 |
|---|---|---|
| committer | Miguel Ojeda <[email protected]> | 2019-09-08 14:53:58 +0200 |
| commit | bfafddd8de426d894fcf3e062370b1efaa195ebc (patch) | |
| tree | 097599d8d0e1fa813a0f6f590cf6be56b4cb32df | |
| parent | 089cf7f6ecb266b6a4164919a2e69bd2f938374a (diff) | |
include/linux/compiler.h: fix Oops for Clang-compiled kernels
GCC unescapes escaped string section names while Clang does not. Because
__section uses the `#` stringification operator for the section name, it
doesn't need to be escaped.
This fixes an Oops observed in distro's that use systemd and not
net.core.bpf_jit_enable=1, when their kernels are compiled with Clang.
Link: https://github.com/ClangBuiltLinux/linux/issues/619
Link: https://bugs.llvm.org/show_bug.cgi?id=42950
Link: https://marc.info/?l=linux-netdev&m=156412960619946&w=2
Link: https://lore.kernel.org/lkml/[email protected]/
Acked-by: Will Deacon <[email protected]>
Reported-by: Sedat Dilek <[email protected]>
Suggested-by: Josh Poimboeuf <[email protected]>
Tested-by: Sedat Dilek <[email protected]>
Signed-off-by: Nick Desaulniers <[email protected]>
[Cherry-picked from the __section cleanup series for 5.3]
[Adjusted commit message]
Signed-off-by: Miguel Ojeda <[email protected]>
| -rw-r--r-- | include/linux/compiler.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/compiler.h b/include/linux/compiler.h index f0fd5636fddb..5e88e7e33abe 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -24,7 +24,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, long ______r; \ static struct ftrace_likely_data \ __aligned(4) \ - __section("_ftrace_annotated_branch") \ + __section(_ftrace_annotated_branch) \ ______f = { \ .data.func = __func__, \ .data.file = __FILE__, \ @@ -60,7 +60,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, #define __trace_if_value(cond) ({ \ static struct ftrace_branch_data \ __aligned(4) \ - __section("_ftrace_branch") \ + __section(_ftrace_branch) \ __if_trace = { \ .func = __func__, \ .file = __FILE__, \ @@ -118,7 +118,7 @@ void ftrace_likely_update(struct ftrace_likely_data *f, int val, ".popsection\n\t" /* Annotate a C jump table to allow objtool to follow the code flow */ -#define __annotate_jump_table __section(".rodata..c_jump_table") +#define __annotate_jump_table __section(.rodata..c_jump_table) #else #define annotate_reachable() @@ -298,7 +298,7 @@ unsigned long read_word_at_a_time(const void *addr) * visible to the compiler. */ #define __ADDRESSABLE(sym) \ - static void * __section(".discard.addressable") __used \ + static void * __section(.discard.addressable) __used \ __PASTE(__addressable_##sym, __LINE__) = (void *)&sym; /** |