linux-kernel - [PATCH] powerpc/pkeys: remove unused pkey_allows

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Message-Id: <1568733750-14580-1-git-send-email-cai@lca.pw>
Date:   Tue, 17 Sep 2019 11:22:30 -0400
From:   Qian Cai <cai@....pw>
To:     mpe@...erman.id.au
Cc:     benh@...nel.crashing.org, paulus@...ba.org, linuxram@...ibm.com,
        linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org,
        Qian Cai <cai@....pw>
Subject: [PATCH] powerpc/pkeys: remove unused pkey_allows_readwrite

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 <cai@....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;
-- 
1.8.3.1