diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-08 10:19:40 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-06-08 10:19:40 -0700 |
| commit | 987aec39a74373c55c3bedd5c3c83896d78fd0a2 (patch) | |
| tree | 66aba6d4f166f269be95fe4d267d57efe533aefd /arch/s390/net/bpf_jit_comp.c | |
| parent | 303cda0ea7c1c33701812ccb80d37083a4093c7c (diff) | |
| parent | d4a4f75cd8f29cd9464a5a32e9224a91571d6649 (diff) | |
Merge 4.1-rc7 into driver-core-next
We want the fixes in this branch as well for testing and merge
resolution.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/s390/net/bpf_jit_comp.c')
| -rw-r--r-- | arch/s390/net/bpf_jit_comp.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/arch/s390/net/bpf_jit_comp.c b/arch/s390/net/bpf_jit_comp.c index 7690dc8e1ab5..20c146d1251a 100644 --- a/arch/s390/net/bpf_jit_comp.c +++ b/arch/s390/net/bpf_jit_comp.c @@ -443,8 +443,11 @@ static void bpf_jit_epilogue(struct bpf_jit *jit) /* * Compile one eBPF instruction into s390x code + * + * NOTE: Use noinline because for gcov (-fprofile-arcs) gcc allocates a lot of + * stack space for the large switch statement. */ -static int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i) +static noinline int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i) { struct bpf_insn *insn = &fp->insnsi[i]; int jmp_off, last, insn_count = 1; @@ -588,8 +591,8 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i) EMIT4(0xb9160000, dst_reg, rc_reg); break; } - case BPF_ALU64 | BPF_DIV | BPF_X: /* dst = dst / (u32) src */ - case BPF_ALU64 | BPF_MOD | BPF_X: /* dst = dst % (u32) src */ + case BPF_ALU64 | BPF_DIV | BPF_X: /* dst = dst / src */ + case BPF_ALU64 | BPF_MOD | BPF_X: /* dst = dst % src */ { int rc_reg = BPF_OP(insn->code) == BPF_DIV ? REG_W1 : REG_W0; @@ -602,10 +605,8 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i) EMIT4_IMM(0xa7090000, REG_W0, 0); /* lgr %w1,%dst */ EMIT4(0xb9040000, REG_W1, dst_reg); - /* llgfr %dst,%src (u32 cast) */ - EMIT4(0xb9160000, dst_reg, src_reg); /* dlgr %w0,%dst */ - EMIT4(0xb9870000, REG_W0, dst_reg); + EMIT4(0xb9870000, REG_W0, src_reg); /* lgr %dst,%rc */ EMIT4(0xb9040000, dst_reg, rc_reg); break; @@ -632,8 +633,8 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i) EMIT4(0xb9160000, dst_reg, rc_reg); break; } - case BPF_ALU64 | BPF_DIV | BPF_K: /* dst = dst / (u32) imm */ - case BPF_ALU64 | BPF_MOD | BPF_K: /* dst = dst % (u32) imm */ + case BPF_ALU64 | BPF_DIV | BPF_K: /* dst = dst / imm */ + case BPF_ALU64 | BPF_MOD | BPF_K: /* dst = dst % imm */ { int rc_reg = BPF_OP(insn->code) == BPF_DIV ? REG_W1 : REG_W0; @@ -649,7 +650,7 @@ static int bpf_jit_insn(struct bpf_jit *jit, struct bpf_prog *fp, int i) EMIT4(0xb9040000, REG_W1, dst_reg); /* dlg %w0,<d(imm)>(%l) */ EMIT6_DISP_LH(0xe3000000, 0x0087, REG_W0, REG_0, REG_L, - EMIT_CONST_U64((u32) imm)); + EMIT_CONST_U64(imm)); /* lgr %dst,%rc */ EMIT4(0xb9040000, dst_reg, rc_reg); break; |