On Tue, Sep 17, 2019 at 11:22:30AM -0400, Qian Cai wrote:
> pkey_allows_readwrite() was first introduced in the commit 5586cf61e108
> ("powerpc: introduce execute-only pkey"), but the usage was removed
> entirely in the commit a4fcc877d4e1 ("powerpc/pkeys: Preallocate
> execute-only key").
>
> Found by the "-Wunused-function" compiler warning flag.
>
> Fixes: a4fcc877d4e1 ("powerpc/pkeys: Preallocate execute-only key")
> Signed-off-by: Qian Cai <c...@lca.pw>
> ---
> arch/powerpc/mm/book3s64/pkeys.c | 10 ----------
> 1 file changed, 10 deletions(-)
>
> diff --git a/arch/powerpc/mm/book3s64/pkeys.c
> b/arch/powerpc/mm/book3s64/pkeys.c
> index ae7fca40e5b3..59e0ebbd8036 100644
> --- a/arch/powerpc/mm/book3s64/pkeys.c
> +++ b/arch/powerpc/mm/book3s64/pkeys.c
> @@ -307,16 +307,6 @@ void thread_pkey_regs_init(struct thread_struct *thread)
> write_iamr(pkey_iamr_mask);
> }
>
> -static inline bool pkey_allows_readwrite(int pkey)
> -{
> - int pkey_shift = pkeyshift(pkey);
> -
> - if (!is_pkey_enabled(pkey))
> - return true;
> -
> - return !(read_amr() & ((AMR_RD_BIT|AMR_WR_BIT) << pkey_shift));
> -}
> -
> int __execute_only_pkey(struct mm_struct *mm)
> {
> return mm->context.execute_only_pkey;
The function was initially used by __execute_only_pkey(), but ones we
changed the implementation of __execute_only_pkey(), the need for
pkey_allows_readwrite() disappeared.
Acked-by: Ram Pai <linux...@us.ibm.com>
--
Ram Pai
