From d8ed45c5dcd455fc5848d47f86883a1b872ac0d0 Mon Sep 17 00:00:00 2001 From: Michel Lespinasse Date: Mon, 8 Jun 2020 21:33:25 -0700 Subject: mmap locking API: use coccinelle to convert mmap_sem rwsem call sites This change converts the existing mmap_sem rwsem calls to use the new mmap locking API instead. The change is generated using coccinelle with the following rule: // spatch --sp-file mmap_lock_api.cocci --in-place --include-headers --dir . @@ expression mm; @@ ( -init_rwsem +mmap_init_lock | -down_write +mmap_write_lock | -down_write_killable +mmap_write_lock_killable | -down_write_trylock +mmap_write_trylock | -up_write +mmap_write_unlock | -downgrade_write +mmap_write_downgrade | -down_read +mmap_read_lock | -down_read_killable +mmap_read_lock_killable | -down_read_trylock +mmap_read_trylock | -up_read +mmap_read_unlock ) -(&mm->mmap_sem) +(mm) Signed-off-by: Michel Lespinasse Signed-off-by: Andrew Morton Reviewed-by: Daniel Jordan Reviewed-by: Laurent Dufour Reviewed-by: Vlastimil Babka Cc: Davidlohr Bueso Cc: David Rientjes Cc: Hugh Dickins Cc: Jason Gunthorpe Cc: Jerome Glisse Cc: John Hubbard Cc: Liam Howlett Cc: Matthew Wilcox Cc: Peter Zijlstra Cc: Ying Han Link: http://lkml.kernel.org/r/20200520052908.204642-5-walken@google.com Signed-off-by: Linus Torvalds --- arch/s390/kvm/priv.c | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) (limited to 'arch/s390/kvm/priv.c') diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index b579b77deea6..57e08b0a0a1a 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -270,18 +270,18 @@ static int handle_iske(struct kvm_vcpu *vcpu) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); retry: unlocked = false; - down_read(¤t->mm->mmap_sem); + mmap_read_lock(current->mm); rc = get_guest_storage_key(current->mm, vmaddr, &key); if (rc) { rc = fixup_user_fault(current, current->mm, vmaddr, FAULT_FLAG_WRITE, &unlocked); if (!rc) { - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); goto retry; } } - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); if (rc == -EFAULT) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); if (rc < 0) @@ -317,17 +317,17 @@ static int handle_rrbe(struct kvm_vcpu *vcpu) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); retry: unlocked = false; - down_read(¤t->mm->mmap_sem); + mmap_read_lock(current->mm); rc = reset_guest_reference_bit(current->mm, vmaddr); if (rc < 0) { rc = fixup_user_fault(current, current->mm, vmaddr, FAULT_FLAG_WRITE, &unlocked); if (!rc) { - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); goto retry; } } - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); if (rc == -EFAULT) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); if (rc < 0) @@ -385,7 +385,7 @@ static int handle_sske(struct kvm_vcpu *vcpu) if (kvm_is_error_hva(vmaddr)) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); - down_read(¤t->mm->mmap_sem); + mmap_read_lock(current->mm); rc = cond_set_guest_storage_key(current->mm, vmaddr, key, &oldkey, m3 & SSKE_NQ, m3 & SSKE_MR, m3 & SSKE_MC); @@ -395,7 +395,7 @@ static int handle_sske(struct kvm_vcpu *vcpu) FAULT_FLAG_WRITE, &unlocked); rc = !rc ? -EAGAIN : rc; } - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); if (rc == -EFAULT) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); if (rc < 0) @@ -1091,7 +1091,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) if (rc) return rc; - down_read(¤t->mm->mmap_sem); + mmap_read_lock(current->mm); rc = cond_set_guest_storage_key(current->mm, vmaddr, key, NULL, nq, mr, mc); if (rc < 0) { @@ -1099,7 +1099,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu) FAULT_FLAG_WRITE, &unlocked); rc = !rc ? -EAGAIN : rc; } - up_read(¤t->mm->mmap_sem); + mmap_read_unlock(current->mm); if (rc == -EFAULT) return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING); if (rc == -EAGAIN) @@ -1220,9 +1220,9 @@ static int handle_essa(struct kvm_vcpu *vcpu) * already correct, we do nothing and avoid the lock. */ if (vcpu->kvm->mm->context.uses_cmm == 0) { - down_write(&vcpu->kvm->mm->mmap_sem); + mmap_write_lock(vcpu->kvm->mm); vcpu->kvm->mm->context.uses_cmm = 1; - up_write(&vcpu->kvm->mm->mmap_sem); + mmap_write_unlock(vcpu->kvm->mm); } /* * If we are here, we are supposed to have CMMA enabled in @@ -1239,11 +1239,11 @@ static int handle_essa(struct kvm_vcpu *vcpu) } else { int srcu_idx; - down_read(&vcpu->kvm->mm->mmap_sem); + mmap_read_lock(vcpu->kvm->mm); srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); i = __do_essa(vcpu, orc); srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx); - up_read(&vcpu->kvm->mm->mmap_sem); + mmap_read_unlock(vcpu->kvm->mm); if (i < 0) return i; /* Account for the possible extra cbrl entry */ @@ -1251,10 +1251,10 @@ static int handle_essa(struct kvm_vcpu *vcpu) } vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */ cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo); - down_read(&gmap->mm->mmap_sem); + mmap_read_lock(gmap->mm); for (i = 0; i < entries; ++i) __gmap_zap(gmap, cbrlo[i]); - up_read(&gmap->mm->mmap_sem); + mmap_read_unlock(gmap->mm); return 0; } -- cgit v1.2.3