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| author | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-14 23:22:30 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-05-15 04:11:45 +0200 |
| commit | 38ca930601631585fbd7826f8f6908055a8dbc9e (patch) | |
| tree | 82c96dc2a059162da559774905f576550c594b55 | |
| parent | bpf, x64: clean up retpoline emission slightly (diff) | |
| download | linux-38ca930601631585fbd7826f8f6908055a8dbc9e.tar.xz linux-38ca930601631585fbd7826f8f6908055a8dbc9e.zip | |
bpf, arm32: save 4 bytes of unneeded stack space
The extra skb_copy_bits() buffer is not used anymore, therefore
remove the extra 4 byte stack space requirement.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | arch/arm/net/bpf_jit_32.c | 13 |
1 files changed, 3 insertions, 10 deletions
diff --git a/arch/arm/net/bpf_jit_32.c b/arch/arm/net/bpf_jit_32.c index 82689b999257..d3ea6454e775 100644 --- a/arch/arm/net/bpf_jit_32.c +++ b/arch/arm/net/bpf_jit_32.c @@ -234,18 +234,11 @@ static void jit_fill_hole(void *area, unsigned int size) #define SCRATCH_SIZE 80 /* total stack size used in JITed code */ -#define _STACK_SIZE \ - (ctx->prog->aux->stack_depth + \ - + SCRATCH_SIZE + \ - + 4 /* extra for skb_copy_bits buffer */) - -#define STACK_SIZE ALIGN(_STACK_SIZE, STACK_ALIGNMENT) +#define _STACK_SIZE (ctx->prog->aux->stack_depth + SCRATCH_SIZE) +#define STACK_SIZE ALIGN(_STACK_SIZE, STACK_ALIGNMENT) /* Get the offset of eBPF REGISTERs stored on scratch space. */ -#define STACK_VAR(off) (STACK_SIZE-off-4) - -/* Offset of skb_copy_bits buffer */ -#define SKB_BUFFER STACK_VAR(SCRATCH_SIZE) +#define STACK_VAR(off) (STACK_SIZE - off) #if __LINUX_ARM_ARCH__ < 7 |