[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[PATCH 1/7] xz: add fall-through comments to a switch statement


  • To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Fri, 19 Nov 2021 11:21:06 +0100
  • Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=suse.com; dmarc=pass action=none header.from=suse.com; dkim=pass header.d=suse.com; arc=none
  • Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=Z0rK9VmEi1jVsksstUzQ7TXl9Hlmh2BpCcX4s9+HTHg=; b=iE0rm04yOlcGyFmDfn0Oyde/fslqXg9HUMESizOLSzph+Omr0cU36uaTB70/8OmuUTgGMBi0nHbfrmbebPAd5X8JwbjrclH2Sm+bUqXByAilHj8SRi3936rxXuBlJ0XYZmhh6HRyWp0AJ3sqHVjw7TCiqpdh/kqs3nhwMAOcLgcEALB/1uahFFEH04F9TQSHCzJA0DTkOEv3WLvidFwSwJmpitTxrklSFK80PG7nY8FDWzu9zONxWxmT3Qu97m+60T8CIZVDVi+yTQmdRQoOyBpJGa5q1IARH0/YmFBVjMs/4FqGJX6R8VgCudV29u2uawqL7n/FLIJq5zSM3VXP/g==
  • Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=ZdDwwF7yPgtmUB2LY1Mq9lo8oMgv4gyOly+Q2n5U/4+8gCvqbjB8RkgfNoVumNnw9gv6Xxv3otJCoZxiyHZis71ZPFSHx6NyBVG5BST/2CxyRL/u73XQ73LGxCQT2bNJE4TO38AzmhkP0B9f+3x/CVEBtgFc5nNZvuvvaOswjAbm02LJJWfWRdLxV4i2ziiHbAv60GtmyorUtuu62DbXEwUhHaj7BM6l+u+tQEE02snw1RYRNiFVrRY9LRUbPzt4bhFQsllD24i2wEWS0K0GiACJVILgrquSu+B026/LOvI5TVUtj1INNSDf8vERxOI6JD77YStOnIsLMqklYwZTmg==
  • Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=suse.com;
  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Ian Jackson <iwj@xxxxxxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
  • Delivery-date: Fri, 19 Nov 2021 10:21:32 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

From: Lasse Collin <lasse.collin@xxxxxxxxxxx>

It's good style. I was also told that GCC 7 is more strict and might
give a warning when such comments are missing.

Suggested-by: Andrei Borzenkov <arvidjaar@xxxxxxxxx>
Signed-off-by: Lasse Collin <lasse.collin@xxxxxxxxxxx>
[Linux commit: 5a244f48ecbbd03a11eb84819c5c599db81823ee]
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
---
Linux has meanwhile further moved to using the "fallthrough" pseudo-
keyword, but us doing so requires the tool stack to first make this
available for use in at least stubdom builds.

--- a/xen/common/xz/dec_stream.c
+++ b/xen/common/xz/dec_stream.c
@@ -583,6 +583,8 @@ static enum xz_ret __init dec_main(struc
                        if (ret != XZ_OK)
                                return ret;
 
+               /* Fall through */
+
                case SEQ_BLOCK_START:
                        /* We need one byte of input to continue. */
                        if (b->in_pos == b->in_size)
@@ -606,6 +608,8 @@ static enum xz_ret __init dec_main(struc
                        s->temp.pos = 0;
                        s->sequence = SEQ_BLOCK_HEADER;
 
+               /* Fall through */
+
                case SEQ_BLOCK_HEADER:
                        if (!fill_temp(s, b))
                                return XZ_OK;
@@ -616,6 +620,8 @@ static enum xz_ret __init dec_main(struc
 
                        s->sequence = SEQ_BLOCK_UNCOMPRESS;
 
+               /* Fall through */
+
                case SEQ_BLOCK_UNCOMPRESS:
                        ret = dec_block(s, b);
                        if (ret != XZ_STREAM_END)
@@ -623,6 +629,8 @@ static enum xz_ret __init dec_main(struc
 
                        s->sequence = SEQ_BLOCK_PADDING;
 
+               /* Fall through */
+
                case SEQ_BLOCK_PADDING:
                        /*
                         * Size of Compressed Data + Block Padding
@@ -643,6 +651,8 @@ static enum xz_ret __init dec_main(struc
 
                        s->sequence = SEQ_BLOCK_CHECK;
 
+               /* Fall through */
+
                case SEQ_BLOCK_CHECK:
                        if (s->check_type == XZ_CHECK_CRC32) {
                                ret = crc32_validate(s, b);
@@ -665,6 +675,8 @@ static enum xz_ret __init dec_main(struc
 
                        s->sequence = SEQ_INDEX_PADDING;
 
+               /* Fall through */
+
                case SEQ_INDEX_PADDING:
                        while ((s->index.size + (b->in_pos - s->in_start))
                                        & 3) {
@@ -687,6 +699,8 @@ static enum xz_ret __init dec_main(struc
 
                        s->sequence = SEQ_INDEX_CRC32;
 
+               /* Fall through */
+
                case SEQ_INDEX_CRC32:
                        ret = crc32_validate(s, b);
                        if (ret != XZ_STREAM_END)
@@ -695,6 +709,8 @@ static enum xz_ret __init dec_main(struc
                        s->temp.size = STREAM_HEADER_SIZE;
                        s->sequence = SEQ_STREAM_FOOTER;
 
+               /* Fall through */
+
                case SEQ_STREAM_FOOTER:
                        if (!fill_temp(s, b))
                                return XZ_OK;




 


Rackspace

Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.