[PATCH 5.10 053/148] x86/retpoline: Move the retpoline thunk declarations to nospec-branch.h
From: Greg Kroah-Hartman
Date: Sat Jul 23 2022 - 06:02:57 EST
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
commit 6fda8a38865607db739be3e567a2387376222dbd upstream.
Because it makes no sense to split the retpoline gunk over multiple
headers.
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Reviewed-by: Borislav Petkov <bp@xxxxxxx>
Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
Tested-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20211026120310.106290934@xxxxxxxxxxxxx
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@xxxxxxxxxxxxx>
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/asm-prototypes.h | 8 --------
arch/x86/include/asm/nospec-branch.h | 7 +++++++
arch/x86/net/bpf_jit_comp.c | 1 -
3 files changed, 7 insertions(+), 9 deletions(-)
--- a/arch/x86/include/asm/asm-prototypes.h
+++ b/arch/x86/include/asm/asm-prototypes.h
@@ -17,11 +17,3 @@
extern void cmpxchg8b_emu(void);
#endif
-#ifdef CONFIG_RETPOLINE
-
-#define GEN(reg) \
- extern asmlinkage void __x86_indirect_thunk_ ## reg (void);
-#include <asm/GEN-for-each-reg.h>
-#undef GEN
-
-#endif /* CONFIG_RETPOLINE */
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -5,6 +5,7 @@
#include <linux/static_key.h>
#include <linux/objtool.h>
+#include <linux/linkage.h>
#include <asm/alternative.h>
#include <asm/cpufeatures.h>
@@ -118,6 +119,12 @@
".popsection\n\t"
#ifdef CONFIG_RETPOLINE
+
+#define GEN(reg) \
+ extern asmlinkage void __x86_indirect_thunk_ ## reg (void);
+#include <asm/GEN-for-each-reg.h>
+#undef GEN
+
#ifdef CONFIG_X86_64
/*
--- a/arch/x86/net/bpf_jit_comp.c
+++ b/arch/x86/net/bpf_jit_comp.c
@@ -15,7 +15,6 @@
#include <asm/set_memory.h>
#include <asm/nospec-branch.h>
#include <asm/text-patching.h>
-#include <asm/asm-prototypes.h>
static u8 *emit_code(u8 *ptr, u32 bytes, unsigned int len)
{