Re: [PATCH v4 10/25] [ACKED] conf: make virDomainPCIAddressGetNextSlot() a local static function

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On 10/18/2016 10:46 AM, Andrea Bolognani wrote:
On Fri, 2016-10-14 at 15:54 -0400, Laine Stump wrote:
This function is no longer needed outside of domain_addr.c.
---
   src/conf/domain_addr.c   | 2 +-
   src/conf/domain_addr.h   | 5 -----
   src/libvirt_private.syms | 1 -
   3 files changed, 1 insertion(+), 7 deletions(-)
diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index 1710220..3a9e474 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -591,7 +591,7 @@ virDomainPCIAddressSetFree(virDomainPCIAddressSetPtr addrs)
   }
-int
+static int
   virDomainPCIAddressGetNextSlot(virDomainPCIAddressSetPtr addrs,
                                  virPCIDeviceAddressPtr next_addr,
                                  virDomainPCIConnectFlags flags)
diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
index 904d060..4d6d12a 100644
--- a/src/conf/domain_addr.h
+++ b/src/conf/domain_addr.h
@@ -155,11 +155,6 @@ int virDomainPCIAddressReleaseSlot(virDomainPCIAddressSetPtr addrs,
                                      virPCIDeviceAddressPtr addr)
       ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
-int virDomainPCIAddressGetNextSlot(virDomainPCIAddressSetPtr addrs,
-                                   virPCIDeviceAddressPtr next_addr,
-                                   virDomainPCIConnectFlags flags)
-    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
As noted while reviewing v3, you're losing both
ATTRIBUTE_NONNULL() with this commit. I was probably not
clear enough last time around, sorry about that :(

Nah, I just assumed you were merely pointing it out, not that you actually wanted me to maintain it in the static function.

I actually dislike ATTRIBUTE_NONNULL() because it doesn't guarantee any behavior of the functions callers, and even worse - it ends up optimizing out any code in the function that actually *checks* for those arguments being NULL. So it ends up being 0 help in catching any accidental NULL references (*maybe* it can be used by a static analyzer, but I remember at least one occasion where it actually covered up / created a bug by removing the check for NULL when one of the callers of a function actually was sending a NULL).

Still, I'll move the ATTRIBUTE_NONNULL over to the static function, and leave the debate of whether or not it really should be there to another day.

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