From: Christophe Leroy (CS GROUP) Date: Tue, 10 Mar 2026 09:59:58 +0000 (+0100) Subject: powerpc/futex: Use masked user access X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=40a1b9d044c7dbbc2976f0432e32dc57d4896b00;p=thirdparty%2Flinux.git powerpc/futex: Use masked user access Commit 861574d51bbd ("powerpc/uaccess: Implement masked user access") provides optimised user access by avoiding the cost of access_ok(). Use masked user access in arch_futex_atomic_op_inuser() Signed-off-by: Christophe Leroy (CS GROUP) Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/e29f6a5c14e5938df68d94bfac6b2f762fb922aa.1773136636.git.chleroy@kernel.org --- diff --git a/arch/powerpc/include/asm/futex.h b/arch/powerpc/include/asm/futex.h index b3001f8b2c1e2..8cf3b2e97e17b 100644 --- a/arch/powerpc/include/asm/futex.h +++ b/arch/powerpc/include/asm/futex.h @@ -33,8 +33,7 @@ static inline int arch_futex_atomic_op_inuser(int op, int oparg, int *oval, { int oldval = 0, ret; - if (!user_access_begin(uaddr, sizeof(u32))) - return -EFAULT; + uaddr = masked_user_access_begin(uaddr); switch (op) { case FUTEX_OP_SET: @@ -69,8 +68,7 @@ futex_atomic_cmpxchg_inatomic(u32 *uval, u32 __user *uaddr, int ret = 0; u32 prev; - if (!user_access_begin(uaddr, sizeof(u32))) - return -EFAULT; + uaddr = masked_user_access_begin(uaddr); __asm__ __volatile__ ( PPC_ATOMIC_ENTRY_BARRIER