Convert (ffs(val) - 1) to ctz32(val)

This commit was generated mechanically by coccinelle from the following
semantic patch:

@@
expression val;
@@
- (ffs(val) - 1)
+ ctz32(val)

The call sites have been audited to ensure the ffs(0) - 1 == -1 case
never occurs (due to input validation, asserts, etc).  Therefore we
don't need to worry about the fact that ctz32(0) == 32.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 1427124571-28598-5-git-send-email-stefanha@redhat.com
Signed-off-by: Kevin Wolf <kwolf@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/hw/scsi/megasas.c b/hw/scsi/megasas.c
index ad7317bfe9..91a5d97c73 100644
--- a/hw/scsi/megasas.c
+++ b/hw/scsi/megasas.c
@@ -804,7 +804,7 @@ static int megasas_ctrl_get_info(MegasasState *s, MegasasCmd *cmd)
                                MFI_INFO_LDOPS_READ_POLICY);
     info.max_strips_per_io = cpu_to_le16(s->fw_sge);
     info.stripe_sz_ops.min = 3;
-    info.stripe_sz_ops.max = ffs(MEGASAS_MAX_SECTORS + 1) - 1;
+    info.stripe_sz_ops.max = ctz32(MEGASAS_MAX_SECTORS + 1);
     info.properties.pred_fail_poll_interval = cpu_to_le16(300);
     info.properties.intr_throttle_cnt = cpu_to_le16(16);
     info.properties.intr_throttle_timeout = cpu_to_le16(50);