diff options
| author | Daniel Borkmann <daniel@iogearbox.net> | 2018-02-27 00:13:52 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-02-27 20:18:58 +0300 |
| commit | 71d22d58b6e507147a9008ce2fd690cf311c97f9 (patch) | |
| tree | 674639a0147c7234c88e3e23d06dc6ff26a6d7b2 | |
| parent | 6f1b5a2b58d8470e5a8b25ab29f5fdb4616ffff8 (diff) | |
| download | linux-71d22d58b6e507147a9008ce2fd690cf311c97f9.tar.xz | |
bpf, x64: remove bpf_flush_icache
Unlike other archs flush_icache_range() is a noop on x64, therefore
remove the JIT's bpf_flush_icache() altogether since not needed.
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Cc: Eric Dumazet <edumazet@google.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | arch/x86/net/bpf_jit_comp.c | 15 |
1 files changed, 2 insertions, 13 deletions
diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c index cbf94d44f3d5..eb661fff94d7 100644 --- a/arch/x86/net/bpf_jit_comp.c +++ b/arch/x86/net/bpf_jit_comp.c @@ -11,10 +11,10 @@ #include <linux/netdevice.h> #include <linux/filter.h> #include <linux/if_vlan.h> -#include <asm/cacheflush.h> +#include <linux/bpf.h> + #include <asm/set_memory.h> #include <asm/nospec-branch.h> -#include <linux/bpf.h> /* * assembly code in arch/x86/net/bpf_jit.S @@ -103,16 +103,6 @@ static int bpf_size_to_x86_bytes(int bpf_size) #define X86_JLE 0x7E #define X86_JG 0x7F -static void bpf_flush_icache(void *start, void *end) -{ - mm_segment_t old_fs = get_fs(); - - set_fs(KERNEL_DS); - smp_wmb(); - flush_icache_range((unsigned long)start, (unsigned long)end); - set_fs(old_fs); -} - #define CHOOSE_LOAD_FUNC(K, func) \ ((int)K < 0 ? ((int)K >= SKF_LL_OFF ? func##_negative_offset : func) : func##_positive_offset) @@ -1266,7 +1256,6 @@ skip_init_addrs: bpf_jit_dump(prog->len, proglen, pass + 1, image); if (image) { - bpf_flush_icache(header, image + proglen); if (!prog->is_func || extra_pass) { bpf_jit_binary_lock_ro(header); } else { |