mirror of
https://github.com/dynup/kpatch
synced 2025-02-18 02:37:01 +00:00
61 lines
1.6 KiB
Diff
61 lines
1.6 KiB
Diff
diff -Nupr src.orig/fs/xfs/xfs_stats.c src/fs/xfs/xfs_stats.c
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--- src.orig/fs/xfs/xfs_stats.c 2024-04-18 14:12:03.471375109 -0400
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+++ src/fs/xfs/xfs_stats.c 2024-04-18 14:12:46.797280945 -0400
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@@ -16,6 +16,8 @@ static int counter_val(struct xfsstats _
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return val;
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}
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+extern char *kpatch_string(void);
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+
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int xfs_stats_format(struct xfsstats __percpu *stats, char *buf)
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{
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int i, j;
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@@ -85,6 +87,34 @@ int xfs_stats_format(struct xfsstats __p
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0);
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#endif
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+ /* Reference a symbol outside the .o yet inside the patch module: */
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+ len += scnprintf(buf + len, PATH_MAX-len, "%s\n", kpatch_string());
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+
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+#ifdef CONFIG_X86_64
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+ /* Test alternatives patching: */
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+ alternative("ud2", "nop", X86_FEATURE_ALWAYS);
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+ alternative("nop", "ud2", X86_FEATURE_IA64);
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+
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+ /* Test paravirt patching: */
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+ slow_down_io(); /* paravirt call */
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+#endif
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+
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+ /* Test pr_debug: */
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+ pr_debug("kpatch: pr_debug() test\n");
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+
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+{
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+ /* Test static branches: */
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+ static DEFINE_STATIC_KEY_TRUE(kpatch_key);
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+
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+ if (static_branch_unlikely(&memcg_kmem_enabled_key))
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+ printk("kpatch: memcg_kmem_enabled_key\n");
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+
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+ BUG_ON(!static_branch_likely(&kpatch_key));
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+ static_branch_disable(&kpatch_key);
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+ BUG_ON(static_branch_likely(&kpatch_key));
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+ static_branch_enable(&kpatch_key);
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+}
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+
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return len;
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}
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diff -Nupr src.orig/net/netlink/af_netlink.c src/net/netlink/af_netlink.c
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--- src.orig/net/netlink/af_netlink.c 2024-04-18 14:12:03.660374698 -0400
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+++ src/net/netlink/af_netlink.c 2024-04-18 14:12:46.798280943 -0400
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@@ -2888,4 +2888,9 @@ panic:
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panic("netlink_init: Cannot allocate nl_table\n");
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}
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+char *kpatch_string(void)
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+{
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+ return "kpatch";
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+}
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+
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core_initcall(netlink_proto_init);
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