public-mirrors/linux
1
0
Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-04-13 09:59:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

netfilter: nf_tables: Only use nf_skip_indirect_calls() when MITIGATION_RETPOLINE

Browse source 
1. MITIGATION_RETPOLINE is x86-only (defined in arch/x86/Kconfig),
so no need to AND with CONFIG_X86 when checking if enabled.

2. Remove unused declaration of nf_skip_indirect_calls() when
MITIGATION_RETPOLINE is disabled to avoid warnings.

3. Declare nf_skip_indirect_calls() and nf_skip_indirect_calls_enable()
as inline when MITIGATION_RETPOLINE is enabled, as they are called
only once and have simple logic.

Fix follow error with clang-21 when W=1e:
  net/netfilter/nf_tables_core.c:39:20: error: unused function 'nf_skip_indirect_calls' [-Werror,-Wunused-function]
     39 | static inline bool nf_skip_indirect_calls(void) { return false; }
        |                    ^~~~~~~~~~~~~~~~~~~~~~
  1 error generated.
  make[4]: *** [scripts/Makefile.build:207: net/netfilter/nf_tables_core.o] Error 1
  make[3]: *** [scripts/Makefile.build:465: net/netfilter] Error 2
  make[3]: *** Waiting for unfinished jobs....

Fixes: d8d7606278 ("netfilter: nf_tables: add static key to skip retpoline workarounds")
Co-developed-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: Wentao Guan <guanwentao@uniontech.com>
Signed-off-by: WangYuli <wangyuli@uniontech.com>
Acked-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
WangYuli 2025-03-19 22:01:47 +08:00 • committed by Pablo Neira Ayuso
parent 932b32ffd7
commit e3a4182edd
1 changed files with 4 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

11
net/netfilter/nf_tables_core.c
View file

@ -21,25 +21,22 @@
#include <net/netfilter/nf_log.h>
#include <net/netfilter/nft_meta.h>
#if defined(CONFIG_MITIGATION_RETPOLINE) && defined(CONFIG_X86)
#ifdef CONFIG_MITIGATION_RETPOLINE
static struct static_key_false nf_tables_skip_direct_calls;
static bool nf_skip_indirect_calls(void)
static inline bool nf_skip_indirect_calls(void)
{
return static_branch_likely(&nf_tables_skip_direct_calls);
}
static void __init nf_skip_indirect_calls_enable(void)
static inline void __init nf_skip_indirect_calls_enable(void)
{
if (!cpu_feature_enabled(X86_FEATURE_RETPOLINE))
static_branch_enable(&nf_tables_skip_direct_calls);
}
#else
static inline bool nf_skip_indirect_calls(void) { return false; }
static inline void nf_skip_indirect_calls_enable(void) { }
#endif
#endif /* CONFIG_MITIGATION_RETPOLINE */
static noinline void __nft_trace_packet(const struct nft_pktinfo *pkt,
const struct nft_verdict *verdict,