When DYNAMIC_FTRACE is enabled, we put 8 16-bit instructions in front of
the function for ftrace use, not 5.
Fixes: afc76b8b8011 ("riscv: Using PATCHABLE_FUNCTION_ENTRY instead of MCOUNT")
Suggested-by: Guo Ren <[email protected]>
Signed-off-by: Li Huafei <[email protected]>
---
v1: https://lore.kernel.org/lkml/[email protected]/
Changlog in v1 -> v2:
- Add the fix tag.
- Delete the expression "4 instructions".
arch/riscv/kernel/ftrace.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/riscv/kernel/ftrace.c b/arch/riscv/kernel/ftrace.c
index 2086f6585773..552088e9acc4 100644
--- a/arch/riscv/kernel/ftrace.c
+++ b/arch/riscv/kernel/ftrace.c
@@ -71,8 +71,8 @@ static int __ftrace_modify_call(unsigned long hook_pos, unsigned long target,
}
/*
- * Put 5 instructions with 16 bytes at the front of function within
- * patchable function entry nops' area.
+ * Put 16 bytes at the front of the function within the patchable function
+ * entry nops' area.
*
* 0: REG_S ra, -SZREG(sp)
* 1: auipc ra, 0x?
--
2.17.1