[PATCH] nfp: bpf: make array exp_mask static, makes object smaller

[PATCH] nfp: bpf: make array exp_mask static, makes object smaller

[Colin King]

From: Colin Ian King <colin.king@canonical.com>

Don't populate the array exp_mask on the stack but instead make it
static. Makes the object code smaller by 224 bytes.

Before:
   text	   data	    bss	    dec	    hex	filename
  77832	   2290	      0	  80122	  138fa	ethernet/netronome/nfp/bpf/jit.o

After:
   text	   data	    bss	    dec	    hex	filename
  77544	   2354	      0	  79898	  1381a	ethernet/netronome/nfp/bpf/jit.o

(gcc version 9.2.1, amd64)

Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
 drivers/net/ethernet/netronome/nfp/bpf/jit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/netronome/nfp/bpf/jit.c b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
index 5afcb3c4c2ef..c80bb83c8ac9 100644
--- a/drivers/net/ethernet/netronome/nfp/bpf/jit.c
+++ b/drivers/net/ethernet/netronome/nfp/bpf/jit.c
@@ -3952,7 +3952,7 @@ static void nfp_bpf_opt_neg_add_sub(struct nfp_prog *nfp_prog)
 static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog)
 {
 	struct nfp_insn_meta *meta1, *meta2;
-	const s32 exp_mask[] = {
+	static const s32 exp_mask[] = {
 		[BPF_B] = 0x000000ffU,
 		[BPF_H] = 0x0000ffffU,
 		[BPF_W] = 0xffffffffU,
-- 
2.20.1

Re: [PATCH] nfp: bpf: make array exp_mask static, makes object smaller

[Jakub Kicinski]

On Mon,  7 Oct 2019 12:52:39 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Don't populate the array exp_mask on the stack but instead make it
> static. Makes the object code smaller by 224 bytes.
> 
> Before:
>    text	   data	    bss	    dec	    hex	filename
>   77832	   2290	      0	  80122	  138fa	ethernet/netronome/nfp/bpf/jit.o
> 
> After:
>    text	   data	    bss	    dec	    hex	filename
>   77544	   2354	      0	  79898	  1381a	ethernet/netronome/nfp/bpf/jit.o
> 
> (gcc version 9.2.1, amd64)
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>

Re: [PATCH] nfp: bpf: make array exp_mask static, makes object smaller

[Jakub Kicinski]

On Mon,  7 Oct 2019 12:52:39 +0100, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
> 
> Don't populate the array exp_mask on the stack but instead make it
> static. Makes the object code smaller by 224 bytes.
> 
> Before:
>    text	   data	    bss	    dec	    hex	filename
>   77832	   2290	      0	  80122	  138fa	ethernet/netronome/nfp/bpf/jit.o
> 
> After:
>    text	   data	    bss	    dec	    hex	filename
>   77544	   2354	      0	  79898	  1381a	ethernet/netronome/nfp/bpf/jit.o
> 
> (gcc version 9.2.1, amd64)
> 
> Signed-off-by: Colin Ian King <colin.king@canonical.com>

Applied to net-next, thanks.