From: Phil Sutter <phil@nwl.cc>
To: Thomas Haller <thaller@redhat.com>
Cc: NetFilter <netfilter-devel@vger.kernel.org>
Subject: Re: [PATCH nft 3/4] all: add free_const() and use it instead of xfree()
Date: Wed, 20 Sep 2023 16:13:43 +0200 [thread overview]
Message-ID: <ZQr+F7ChyFfArBYQ@orbyte.nwl.cc> (raw)
In-Reply-To: <20230920131554.204899-4-thaller@redhat.com>
On Wed, Sep 20, 2023 at 03:13:40PM +0200, Thomas Haller wrote:
[...]
> There are many places that rightly cast away const during free. But not
> all of them. Add a free_const() macro, which is like free(), but accepts
> const pointers. We should always make an intentional choice whether to
> use free() or free_const(). Having a free_const() macro makes this very
> common choice clearer, instead of adding a (void*) cast at many places.
I wonder whether pointers to allocated data should be const in the first
place. Maybe I miss the point here? Looking at flow offload statement
for instance, should 'table_name' not be 'char *' instead of using this
free_const() to free it?
Cheers, Phil
next prev parent reply other threads:[~2023-09-20 14:13 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-20 13:13 [PATCH nft 0/4] remove xfree() and add free_const()+nft_gmp_free() Thomas Haller
2023-09-20 13:13 ` [PATCH nft 1/4] datatype: don't return a const string from cgroupv2_get_path() Thomas Haller
2023-09-20 13:13 ` [PATCH nft 2/4] gmputil: add nft_gmp_free() to free strings from mpz_get_str() Thomas Haller
2023-09-20 14:05 ` Phil Sutter
2023-09-20 14:46 ` Thomas Haller
2023-09-20 16:04 ` Phil Sutter
2023-09-20 13:13 ` [PATCH nft 3/4] all: add free_const() and use it instead of xfree() Thomas Haller
2023-09-20 14:13 ` Phil Sutter [this message]
2023-09-20 16:06 ` Pablo Neira Ayuso
2023-09-20 16:49 ` Phil Sutter
2023-09-20 16:52 ` Pablo Neira Ayuso
2023-09-20 18:03 ` Thomas Haller
2023-09-20 18:22 ` Phil Sutter
2023-09-20 19:48 ` Thomas Haller
2023-09-20 22:50 ` Phil Sutter
2023-09-21 9:08 ` Thomas Haller
2023-09-20 13:13 ` [PATCH nft 4/4] all: remove xfree() and use plain free() Thomas Haller
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