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net/tls: fix const assignment warning 

Building with some experimental patches, I came across a warning
in the tls code:

include/linux/compiler.h:215:30: warning: assignment discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
  215 |  *(volatile typeof(x) *)&(x) = (val);  \
      |                              ^
net/tls/tls_main.c:650:4: note: in expansion of macro 'smp_store_release'
  650 |    smp_store_release(&saved_tcpv4_prot, prot);

This appears to be a legitimate warning about assigning a const pointer
into the non-const 'saved_tcpv4_prot' global. Annotate both the ipv4 and
ipv6 pointers 'const' to make the code internally consistent.

Fixes: 5bb4c45d46 ("net/tls: Read sk_prot once when building tls proto ops")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2020-04-08 20:54:43 +02:00 committed by David S. Miller
parent 2abe05234f
commit f691a25ce5
1 changed files with 2 additions and 2 deletions
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4
net/tls/tls_main.c
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@ -56,9 +56,9 @@ enum {
TLS_NUM_PROTS,
};
static struct proto *saved_tcpv6_prot;
static const struct proto *saved_tcpv6_prot;
static DEFINE_MUTEX(tcpv6_prot_mutex);
static struct proto *saved_tcpv4_prot;
static const struct proto *saved_tcpv4_prot;
static DEFINE_MUTEX(tcpv4_prot_mutex);
static struct proto tls_prots[TLS_NUM_PROTS][TLS_NUM_CONFIG][TLS_NUM_CONFIG];
static struct proto_ops tls_sw_proto_ops;