riscv: ftrace: Properly acquire text_mutex to fix a race condition

As reported by lockdep, some patching was done without acquiring
text_mutex, so there could be a race when mapping the page to patch
since we use the same fixmap entry.

Reported-by: Han Gao <[email protected]>
Reported-by: Vivian Wang <[email protected]>
Reported-by: Yao Zi <[email protected]>
Closes: https://lore.kernel.org/linux-riscv/[email protected]/
Tested-by: Yao Zi <[email protected]>
Tested-by: Han Gao <[email protected]>
Reviewed-by: Masami Hiramatsu (Google) <[email protected]>
Signed-off-by: Alexandre Ghiti <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Palmer Dabbelt <[email protected]>

0 files changed, 0 insertions, 0 deletions