This is a note to let you know that I've just added the patch titled parisc: Fix mask used to select futex spinlock to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: parisc-fix-mask-used-to-select-futex-spinlock.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From d3a5a68cff47f6eead84504c3c28376b85053242 Mon Sep 17 00:00:00 2001 From: John David Anglin <dave.anglin@xxxxxxxx> Date: Tue, 21 Dec 2021 13:33:16 -0500 Subject: parisc: Fix mask used to select futex spinlock From: John David Anglin <dave.anglin@xxxxxxxx> commit d3a5a68cff47f6eead84504c3c28376b85053242 upstream. The address bits used to select the futex spinlock need to match those used in the LWS code in syscall.S. The mask 0x3f8 only selects 7 bits. It should select 8 bits. This change fixes the glibc nptl/tst-cond24 and nptl/tst-cond25 tests. Signed-off-by: John David Anglin <dave.anglin@xxxxxxxx> Fixes: 53a42b6324b8 ("parisc: Switch to more fine grained lws locks") Cc: stable@xxxxxxxxxxxxxxx # 5.10+ Signed-off-by: Helge Deller <deller@xxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/parisc/include/asm/futex.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/parisc/include/asm/futex.h +++ b/arch/parisc/include/asm/futex.h @@ -16,7 +16,7 @@ static inline void _futex_spin_lock_irqsave(u32 __user *uaddr, unsigned long int *flags) { extern u32 lws_lock_start[]; - long index = ((long)uaddr & 0x3f8) >> 1; + long index = ((long)uaddr & 0x7f8) >> 1; arch_spinlock_t *s = (arch_spinlock_t *)&lws_lock_start[index]; local_irq_save(*flags); arch_spin_lock(s); @@ -26,7 +26,7 @@ static inline void _futex_spin_unlock_irqrestore(u32 __user *uaddr, unsigned long int *flags) { extern u32 lws_lock_start[]; - long index = ((long)uaddr & 0x3f8) >> 1; + long index = ((long)uaddr & 0x7f8) >> 1; arch_spinlock_t *s = (arch_spinlock_t *)&lws_lock_start[index]; arch_spin_unlock(s); local_irq_restore(*flags); Patches currently in stable-queue which might be from dave.anglin@xxxxxxxx are queue-5.10/parisc-fix-mask-used-to-select-futex-spinlock.patch queue-5.10/parisc-correct-completer-in-lws-start.patch