[PATCH v4 bpf-next 4/4] selftests/bpf: fix compiling loop{1,2,3}.c on s390

[Ilya Leoshkevich]

Use PT_REGS_RC(ctx) instead of ctx->rax, which is not present on s390.

Signed-off-by: Ilya Leoshkevich <i...@linux.ibm.com>
---
 tools/testing/selftests/bpf/progs/loop1.c | 2 +-
 tools/testing/selftests/bpf/progs/loop2.c | 2 +-
 tools/testing/selftests/bpf/progs/loop3.c | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tools/testing/selftests/bpf/progs/loop1.c 
b/tools/testing/selftests/bpf/progs/loop1.c
index dea395af9ea9..7cdb7f878310 100644
--- a/tools/testing/selftests/bpf/progs/loop1.c
+++ b/tools/testing/selftests/bpf/progs/loop1.c
@@ -18,7 +18,7 @@ int nested_loops(volatile struct pt_regs* ctx)
        for (j = 0; j < 300; j++)
                for (i = 0; i < j; i++) {
                        if (j & 1)
-                               m = ctx->rax;
+                               m = PT_REGS_RC(ctx);
                        else
                                m = j;
                        sum += i * m;
diff --git a/tools/testing/selftests/bpf/progs/loop2.c 
b/tools/testing/selftests/bpf/progs/loop2.c
index 0637bd8e8bcf..9b2f808a2863 100644
--- a/tools/testing/selftests/bpf/progs/loop2.c
+++ b/tools/testing/selftests/bpf/progs/loop2.c
@@ -16,7 +16,7 @@ int while_true(volatile struct pt_regs* ctx)
        int i = 0;
 
        while (true) {
-               if (ctx->rax & 1)
+               if (PT_REGS_RC(ctx) & 1)
                        i += 3;
                else
                        i += 7;
diff --git a/tools/testing/selftests/bpf/progs/loop3.c 
b/tools/testing/selftests/bpf/progs/loop3.c
index 30a0f6cba080..d727657d51e2 100644
--- a/tools/testing/selftests/bpf/progs/loop3.c
+++ b/tools/testing/selftests/bpf/progs/loop3.c
@@ -16,7 +16,7 @@ int while_true(volatile struct pt_regs* ctx)
        __u64 i = 0, sum = 0;
        do {
                i++;
-               sum += ctx->rax;
+               sum += PT_REGS_RC(ctx);
        } while (i < 0x100000000ULL);
        return sum;
 }
-- 
2.21.0