From: Ilya Leoshkevich <iii@linux.ibm.com>
Date: Mon, 18 Nov 2019 19:03:40 +0100
Subject: s390/bpf: Remove JITed image size limitations
Patch-mainline: v5.5-rc1
Git-commit: d1242b10ff03a40ae095e6dd54aac4a6f0f547d5
References: bsc#1177028

Now that jump and long displacement ranges are no longer a problem,
remove the limit on JITed image size. In practice it's still limited by
2G, but with verifier allowing "only" 1M instructions, it's not an
issue.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20191118180340.68373-7-iii@linux.ibm.com
Acked-by: Gary Lin <glin@suse.com>
---
 arch/s390/net/bpf_jit_comp.c |    7 -------
 1 file changed, 7 deletions(-)

--- a/arch/s390/net/bpf_jit_comp.c
+++ b/arch/s390/net/bpf_jit_comp.c
@@ -52,8 +52,6 @@ struct bpf_jit {
 	int labels[1];		/* Labels for local jumps */
 };
 
-#define BPF_SIZE_MAX	0xffff	/* Max size for program (16 bit branches) */
-
 #define SEEN_MEM	BIT(0)		/* use mem[] for temporary storage */
 #define SEEN_LITERAL	BIT(1)		/* code uses literals */
 #define SEEN_FUNC	BIT(2)		/* calls C functions */
@@ -1631,11 +1629,6 @@ struct bpf_prog *bpf_int_jit_compile(str
 	/*
 	 * Final pass: Allocate and generate program
 	 */
-	if (jit.size >= BPF_SIZE_MAX) {
-		fp = orig_fp;
-		goto free_addrs;
-	}
-
 	header = bpf_jit_binary_alloc(jit.size, &jit.prg_buf, 8, jit_fill_hole);
 	if (!header) {
 		fp = orig_fp;