[PATCH v2 3/8] migration: Add spaces around operator

Bihong Yu posted 8 patches 5 years, 4 months ago
Maintainers: "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Fam Zheng <fam@euphon.net>, Juan Quintela <quintela@redhat.com>, Stefan Hajnoczi <stefanha@redhat.com>
There is a newer version of this series
[PATCH v2 3/8] migration: Add spaces around operator
Posted by Bihong Yu 5 years, 4 months ago
Signed-off-by: Bihong Yu <yubihong@huawei.com>
Reviewed-by: Chuan Zheng <zhengchuan@huawei.com>
---
 migration/migration.c    |  4 ++--
 migration/postcopy-ram.c |  2 +-
 migration/ram.c          |  2 +-
 migration/savevm.c       |  2 +-
 migration/vmstate.c      | 10 +++++-----
 5 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/migration/migration.c b/migration/migration.c
index 0575ecb..e050f57 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2478,8 +2478,8 @@ static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname,
      * Since we currently insist on matching page sizes, just sanity check
      * we're being asked for whole host pages.
      */
-    if (start & (our_host_ps-1) ||
-       (len & (our_host_ps-1))) {
+    if (start & (our_host_ps - 1) ||
+       (len & (our_host_ps - 1))) {
         error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT
                      " len: %zd", __func__, start, len);
         mark_source_rp_bad(ms);
diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
index 0a2f88a8..eea92bb 100644
--- a/migration/postcopy-ram.c
+++ b/migration/postcopy-ram.c
@@ -403,7 +403,7 @@ bool postcopy_ram_supported_by_host(MigrationIncomingState *mis)
                      strerror(errno));
         goto out;
     }
-    g_assert(((size_t)testarea & (pagesize-1)) == 0);
+    g_assert(((size_t)testarea & (pagesize - 1)) == 0);
 
     reg_struct.range.start = (uintptr_t)testarea;
     reg_struct.range.len = pagesize;
diff --git a/migration/ram.c b/migration/ram.c
index 6ed4f9e..0aea78f 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1563,7 +1563,7 @@ int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len)
         rs->last_req_rb = ramblock;
     }
     trace_ram_save_queue_pages(ramblock->idstr, start, len);
-    if (start+len > ramblock->used_length) {
+    if (start + len > ramblock->used_length) {
         error_report("%s request overrun start=" RAM_ADDR_FMT " len="
                      RAM_ADDR_FMT " blocklen=" RAM_ADDR_FMT,
                      __func__, start, len, ramblock->used_length);
diff --git a/migration/savevm.c b/migration/savevm.c
index d2e141f..9e95df1 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -521,7 +521,7 @@ static const VMStateDescription vmstate_configuration = {
         VMSTATE_VBUFFER_ALLOC_UINT32(name, SaveState, 0, NULL, len),
         VMSTATE_END_OF_LIST()
     },
-    .subsections = (const VMStateDescription*[]) {
+    .subsections = (const VMStateDescription * []) {
         &vmstate_target_page_bits,
         &vmstate_capabilites,
         &vmstate_uuid,
diff --git a/migration/vmstate.c b/migration/vmstate.c
index bafa890..e9d2aef 100644
--- a/migration/vmstate.c
+++ b/migration/vmstate.c
@@ -32,13 +32,13 @@ static int vmstate_n_elems(void *opaque, const VMStateField *field)
     if (field->flags & VMS_ARRAY) {
         n_elems = field->num;
     } else if (field->flags & VMS_VARRAY_INT32) {
-        n_elems = *(int32_t *)(opaque+field->num_offset);
+        n_elems = *(int32_t *)(opaque + field->num_offset);
     } else if (field->flags & VMS_VARRAY_UINT32) {
-        n_elems = *(uint32_t *)(opaque+field->num_offset);
+        n_elems = *(uint32_t *)(opaque + field->num_offset);
     } else if (field->flags & VMS_VARRAY_UINT16) {
-        n_elems = *(uint16_t *)(opaque+field->num_offset);
+        n_elems = *(uint16_t *)(opaque + field->num_offset);
     } else if (field->flags & VMS_VARRAY_UINT8) {
-        n_elems = *(uint8_t *)(opaque+field->num_offset);
+        n_elems = *(uint8_t *)(opaque + field->num_offset);
     }
 
     if (field->flags & VMS_MULTIPLY_ELEMENTS) {
@@ -54,7 +54,7 @@ static int vmstate_size(void *opaque, const VMStateField *field)
     int size = field->size;
 
     if (field->flags & VMS_VBUFFER) {
-        size = *(int32_t *)(opaque+field->size_offset);
+        size = *(int32_t *)(opaque + field->size_offset);
         if (field->flags & VMS_MULTIPLY) {
             size *= field->size;
         }
-- 
1.8.3.1


Re: [PATCH v2 3/8] migration: Add spaces around operator
Posted by Dr. David Alan Gilbert 5 years, 3 months ago
* Bihong Yu (yubihong@huawei.com) wrote:
> Signed-off-by: Bihong Yu <yubihong@huawei.com>
> Reviewed-by: Chuan Zheng <zhengchuan@huawei.com>

Yes that's OK, I'm a bit sturprised we need the space afte rthe * in the
VMStateDescription case, I wouldn't necessarily go and change them all.



Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>

> ---
>  migration/migration.c    |  4 ++--
>  migration/postcopy-ram.c |  2 +-
>  migration/ram.c          |  2 +-
>  migration/savevm.c       |  2 +-
>  migration/vmstate.c      | 10 +++++-----
>  5 files changed, 10 insertions(+), 10 deletions(-)
> 
> diff --git a/migration/migration.c b/migration/migration.c
> index 0575ecb..e050f57 100644
> --- a/migration/migration.c
> +++ b/migration/migration.c
> @@ -2478,8 +2478,8 @@ static void migrate_handle_rp_req_pages(MigrationState *ms, const char* rbname,
>       * Since we currently insist on matching page sizes, just sanity check
>       * we're being asked for whole host pages.
>       */
> -    if (start & (our_host_ps-1) ||
> -       (len & (our_host_ps-1))) {
> +    if (start & (our_host_ps - 1) ||
> +       (len & (our_host_ps - 1))) {
>          error_report("%s: Misaligned page request, start: " RAM_ADDR_FMT
>                       " len: %zd", __func__, start, len);
>          mark_source_rp_bad(ms);
> diff --git a/migration/postcopy-ram.c b/migration/postcopy-ram.c
> index 0a2f88a8..eea92bb 100644
> --- a/migration/postcopy-ram.c
> +++ b/migration/postcopy-ram.c
> @@ -403,7 +403,7 @@ bool postcopy_ram_supported_by_host(MigrationIncomingState *mis)
>                       strerror(errno));
>          goto out;
>      }
> -    g_assert(((size_t)testarea & (pagesize-1)) == 0);
> +    g_assert(((size_t)testarea & (pagesize - 1)) == 0);
>  
>      reg_struct.range.start = (uintptr_t)testarea;
>      reg_struct.range.len = pagesize;
> diff --git a/migration/ram.c b/migration/ram.c
> index 6ed4f9e..0aea78f 100644
> --- a/migration/ram.c
> +++ b/migration/ram.c
> @@ -1563,7 +1563,7 @@ int ram_save_queue_pages(const char *rbname, ram_addr_t start, ram_addr_t len)
>          rs->last_req_rb = ramblock;
>      }
>      trace_ram_save_queue_pages(ramblock->idstr, start, len);
> -    if (start+len > ramblock->used_length) {
> +    if (start + len > ramblock->used_length) {
>          error_report("%s request overrun start=" RAM_ADDR_FMT " len="
>                       RAM_ADDR_FMT " blocklen=" RAM_ADDR_FMT,
>                       __func__, start, len, ramblock->used_length);
> diff --git a/migration/savevm.c b/migration/savevm.c
> index d2e141f..9e95df1 100644
> --- a/migration/savevm.c
> +++ b/migration/savevm.c
> @@ -521,7 +521,7 @@ static const VMStateDescription vmstate_configuration = {
>          VMSTATE_VBUFFER_ALLOC_UINT32(name, SaveState, 0, NULL, len),
>          VMSTATE_END_OF_LIST()
>      },
> -    .subsections = (const VMStateDescription*[]) {
> +    .subsections = (const VMStateDescription * []) {
>          &vmstate_target_page_bits,
>          &vmstate_capabilites,
>          &vmstate_uuid,
> diff --git a/migration/vmstate.c b/migration/vmstate.c
> index bafa890..e9d2aef 100644
> --- a/migration/vmstate.c
> +++ b/migration/vmstate.c
> @@ -32,13 +32,13 @@ static int vmstate_n_elems(void *opaque, const VMStateField *field)
>      if (field->flags & VMS_ARRAY) {
>          n_elems = field->num;
>      } else if (field->flags & VMS_VARRAY_INT32) {
> -        n_elems = *(int32_t *)(opaque+field->num_offset);
> +        n_elems = *(int32_t *)(opaque + field->num_offset);
>      } else if (field->flags & VMS_VARRAY_UINT32) {
> -        n_elems = *(uint32_t *)(opaque+field->num_offset);
> +        n_elems = *(uint32_t *)(opaque + field->num_offset);
>      } else if (field->flags & VMS_VARRAY_UINT16) {
> -        n_elems = *(uint16_t *)(opaque+field->num_offset);
> +        n_elems = *(uint16_t *)(opaque + field->num_offset);
>      } else if (field->flags & VMS_VARRAY_UINT8) {
> -        n_elems = *(uint8_t *)(opaque+field->num_offset);
> +        n_elems = *(uint8_t *)(opaque + field->num_offset);
>      }
>  
>      if (field->flags & VMS_MULTIPLY_ELEMENTS) {
> @@ -54,7 +54,7 @@ static int vmstate_size(void *opaque, const VMStateField *field)
>      int size = field->size;
>  
>      if (field->flags & VMS_VBUFFER) {
> -        size = *(int32_t *)(opaque+field->size_offset);
> +        size = *(int32_t *)(opaque + field->size_offset);
>          if (field->flags & VMS_MULTIPLY) {
>              size *= field->size;
>          }
> -- 
> 1.8.3.1
> 
-- 
Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK


Re: [PATCH v2 3/8] migration: Add spaces around operator
Posted by Markus Armbruster 5 years, 3 months ago
"Dr. David Alan Gilbert" <dgilbert@redhat.com> writes:

> * Bihong Yu (yubihong@huawei.com) wrote:
>> Signed-off-by: Bihong Yu <yubihong@huawei.com>
>> Reviewed-by: Chuan Zheng <zhengchuan@huawei.com>
>
> Yes that's OK, I'm a bit sturprised we need the space afte rthe * in the
> VMStateDescription case, I wouldn't necessarily go and change them all.

We don't: it's not the binary multiplication operator *, where we want a
space on both sides, it's a pointer declarator, where we want a space on
the left only.

Example:

    int *pa, *pb, *pc;
    *pa = *pb * *pc;

Note the space on both side of binary operator * (multiplication), but
only on the left side of the pointer declarator's * and the unary
operator * (indirection).

> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
[...]
>> diff --git a/migration/savevm.c b/migration/savevm.c
>> index d2e141f..9e95df1 100644
>> --- a/migration/savevm.c
>> +++ b/migration/savevm.c
>> @@ -521,7 +521,7 @@ static const VMStateDescription vmstate_configuration = {
>>          VMSTATE_VBUFFER_ALLOC_UINT32(name, SaveState, 0, NULL, len),
>>          VMSTATE_END_OF_LIST()
>>      },
>> -    .subsections = (const VMStateDescription*[]) {
>> +    .subsections = (const VMStateDescription * []) {
>>          &vmstate_target_page_bits,
>>          &vmstate_capabilites,
>>          &vmstate_uuid,

Should be

   .subsections = (const VMStateDescription *[]) {

[...]


Re: [PATCH v2 3/8] migration: Add spaces around operator
Posted by Bihong Yu 5 years, 3 months ago
Yes, I used to think "const VMStateDescription *[]" was right, but when I search
similar expressions, most of all are "xxx * []". Such as:
fsdev/qemu-fsdev.c:54:        .opts = (const char * [])
hw/intc/s390_flic_kvm.c:567:    .subsections = (const VMStateDescription * [])
...

So, I keep the same style. Should I change it to "const VMStateDescription *[]"?

On 2020/10/19 16:24, Markus Armbruster wrote:
> "Dr. David Alan Gilbert" <dgilbert@redhat.com> writes:
> 
>> * Bihong Yu (yubihong@huawei.com) wrote:
>>> Signed-off-by: Bihong Yu <yubihong@huawei.com>
>>> Reviewed-by: Chuan Zheng <zhengchuan@huawei.com>
>>
>> Yes that's OK, I'm a bit sturprised we need the space afte rthe * in the
>> VMStateDescription case, I wouldn't necessarily go and change them all.
> 
> We don't: it's not the binary multiplication operator *, where we want a
> space on both sides, it's a pointer declarator, where we want a space on
> the left only.
> 
> Example:
> 
>     int *pa, *pb, *pc;
>     *pa = *pb * *pc;
> 
> Note the space on both side of binary operator * (multiplication), but
> only on the left side of the pointer declarator's * and the unary
> operator * (indirection).
> 
>> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
> [...]
>>> diff --git a/migration/savevm.c b/migration/savevm.c
>>> index d2e141f..9e95df1 100644
>>> --- a/migration/savevm.c
>>> +++ b/migration/savevm.c
>>> @@ -521,7 +521,7 @@ static const VMStateDescription vmstate_configuration = {
>>>          VMSTATE_VBUFFER_ALLOC_UINT32(name, SaveState, 0, NULL, len),
>>>          VMSTATE_END_OF_LIST()
>>>      },
>>> -    .subsections = (const VMStateDescription*[]) {
>>> +    .subsections = (const VMStateDescription * []) {
>>>          &vmstate_target_page_bits,
>>>          &vmstate_capabilites,
>>>          &vmstate_uuid,
> 
> Should be
> 
>    .subsections = (const VMStateDescription *[]) {
> 
> [...]
> 
> .
> 

Re: [PATCH v2 3/8] migration: Add spaces around operator
Posted by Markus Armbruster 5 years, 3 months ago
Bihong Yu <yubihong@huawei.com> writes:

> Yes, I used to think "const VMStateDescription *[]" was right, but when I search
> similar expressions, most of all are "xxx * []". Such as:
> fsdev/qemu-fsdev.c:54:        .opts = (const char * [])
> hw/intc/s390_flic_kvm.c:567:    .subsections = (const VMStateDescription * [])
> ...

All three variations occur in the code: no space, space on both sides,
space only on the left.

> So, I keep the same style. Should I change it to "const VMStateDescription *[]"?

Dropping the change to savevm.c should be fine.

Changing it to "VMStateDescription *[]" should be also fine.

I figure you can keep David's R-by in both cases.

[...]


Re: [PATCH v2 3/8] migration: Add spaces around operator
Posted by Bihong Yu 5 years, 3 months ago
OK, I will change it to "VMStateDescription *[]". Thank you for your review.

On 2020/10/19 19:59, Markus Armbruster wrote:
> Bihong Yu <yubihong@huawei.com> writes:
> 
>> Yes, I used to think "const VMStateDescription *[]" was right, but when I search
>> similar expressions, most of all are "xxx * []". Such as:
>> fsdev/qemu-fsdev.c:54:        .opts = (const char * [])
>> hw/intc/s390_flic_kvm.c:567:    .subsections = (const VMStateDescription * [])
>> ...
> 
> All three variations occur in the code: no space, space on both sides,
> space only on the left.
> 
>> So, I keep the same style. Should I change it to "const VMStateDescription *[]"?
> 
> Dropping the change to savevm.c should be fine.
> 
> Changing it to "VMStateDescription *[]" should be also fine.
> 
> I figure you can keep David's R-by in both cases.
> 
> [...]
> 
> .
>