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d81c03f05e
These patches were generated from: https://github.com/raspberrypi/linux/commits/rpi-6.12.y With the following command: git format-patch -N v6.12.27..HEAD (HEAD -> 8d3206ee456a5ecdf9ddbfd8e5e231e4f0cd716e) Exceptions: - (def)configs patches - github workflows patches - applied & reverted patches - readme patches - wireless patches Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
60 lines
1.7 KiB
Diff
60 lines
1.7 KiB
Diff
From 70a98ef8898d216ab6788b23057cc34ad91e2bc0 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Mon, 9 Dec 2024 14:38:17 +0000
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Subject: [PATCH] cgroup: Add cgroup_enable option
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The upstream addition of the kernel parameter cgroup_disable makes it
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possible to configure cgroups at boot time. In theory, re-enabling a
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disabled cgroup is simply a case of removing the relevant cgroup_disable
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setting, but this is difficult if the setting comes from Device Tree.
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Re-introduce cgroup_enable as a way around the problem.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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kernel/cgroup/cgroup.c | 33 +++++++++++++++++++++++++++++++++
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1 file changed, 33 insertions(+)
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--- a/kernel/cgroup/cgroup.c
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+++ b/kernel/cgroup/cgroup.c
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@@ -6887,6 +6887,39 @@ static int __init cgroup_disable(char *s
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}
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__setup("cgroup_disable=", cgroup_disable);
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+static int __init cgroup_enable(char *str)
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+{
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+ struct cgroup_subsys *ss;
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+ char *token;
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+ int i;
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+
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+ while ((token = strsep(&str, ",")) != NULL) {
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+ if (!*token)
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+ continue;
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+
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+ for_each_subsys(ss, i) {
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+ if (strcmp(token, ss->name) &&
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+ strcmp(token, ss->legacy_name))
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+ continue;
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+
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+ static_branch_enable(cgroup_subsys_enabled_key[i]);
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+ pr_info("Enabling %s control group subsystem\n",
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+ ss->name);
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+ }
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+
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+ for (i = 0; i < OPT_FEATURE_COUNT; i++) {
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+ if (strcmp(token, cgroup_opt_feature_names[i]))
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+ continue;
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+ cgroup_feature_disable_mask &= ~(1 << i);
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+ pr_info("Enabling %s control group feature\n",
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+ cgroup_opt_feature_names[i]);
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+ break;
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+ }
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+ }
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+ return 1;
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+}
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+__setup("cgroup_enable=", cgroup_enable);
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+
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void __init __weak enable_debug_cgroup(void) { }
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static int __init enable_cgroup_debug(char *str)
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