From: Jim Cromie <jim.cromie@gmail.com>
To: "Maarten Lankhorst" <maarten.lankhorst@linux.intel.com>,
"Maxime Ripard" <mripard@kernel.org>,
"Thomas Zimmermann" <tzimmermann@suse.de>,
"David Airlie" <airlied@linux.ie>,
"Daniel Vetter" <daniel@ffwll.ch>,
"Harry Wentland" <harry.wentland@amd.com>,
"Leo Li" <sunpeng.li@amd.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
"Christian König" <christian.koenig@amd.com>,
"Pan, Xinhui" <Xinhui.Pan@amd.com>,
"Zhenyu Wang" <zhenyuw@linux.intel.com>,
"Zhi Wang" <zhi.a.wang@intel.com>,
"Jani Nikula" <jani.nikula@linux.intel.com>,
"Joonas Lahtinen" <joonas.lahtinen@linux.intel.com>,
"Rodrigo Vivi" <rodrigo.vivi@intel.com>,
"Jason Baron" <jbaron@akamai.com>,
"Ashley Thomas" <Ashley.Thomas2@amd.com>,
"Aurabindo Pillai" <aurabindo.pillai@amd.com>,
"Qingqing Zhuo" <qingqing.zhuo@amd.com>,
"Wyatt Wood" <Wyatt.Wood@amd.com>,
"Jim Cromie" <jim.cromie@gmail.com>,
"Jessica Yu" <jeyu@kernel.org>, "Johan Hovold" <johan@kernel.org>,
"Joe Perches" <joe@perches.com>,
"Miguel Ojeda" <ojeda@kernel.org>,
"Nick Desaulniers" <ndesaulniers@gooogle.com>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org,
amd-gfx@lists.freedesktop.org,
intel-gvt-dev@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org
Subject: [PATCH v4 2/7] moduleparam: add data member to struct kernel_param
Date: Sat, 31 Jul 2021 15:41:59 -0600 [thread overview]
Message-ID: <20210731214211.657280-3-jim.cromie@gmail.com> (raw)
In-Reply-To: <20210731214211.657280-1-jim.cromie@gmail.com>
Add a void* data member to the struct, to allow attaching private data
that will be used soon by a setter method (via kp->data) to perform
more elaborate actions.
To attach the data at compile time, add new macros:
module_param_cbd() derives from module_param_cb(), adding data param.
It calls __module_param_call_wdata(), which has accepts new data
param and inits .data with it. Re-define __module_param_call() using it.
Use of this new data member will be rare, it might be worth redoing
this as a separate/sub-type to keep the base case.
Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
---
include/linux/moduleparam.h | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/include/linux/moduleparam.h b/include/linux/moduleparam.h
index eed280fae433..e9495b1e794d 100644
--- a/include/linux/moduleparam.h
+++ b/include/linux/moduleparam.h
@@ -78,6 +78,7 @@ struct kernel_param {
const struct kparam_string *str;
const struct kparam_array *arr;
};
+ void *data;
};
extern const struct kernel_param __start___param[], __stop___param[];
@@ -175,6 +176,9 @@ struct kparam_array
#define module_param_cb(name, ops, arg, perm) \
__module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0)
+#define module_param_cbd(name, ops, arg, perm, data) \
+ __module_param_call_wdata(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, 0, data)
+
#define module_param_cb_unsafe(name, ops, arg, perm) \
__module_param_call(MODULE_PARAM_PREFIX, name, ops, arg, perm, -1, \
KERNEL_PARAM_FL_UNSAFE)
@@ -284,14 +288,17 @@ struct kparam_array
/* This is the fundamental function for registering boot/module
parameters. */
-#define __module_param_call(prefix, name, ops, arg, perm, level, flags) \
+#define __module_param_call(prefix, name, ops, arg, perm, level, flags) \
+ __module_param_call_wdata(prefix, name, ops, arg, perm, level, flags, NULL)
+
+#define __module_param_call_wdata(prefix, name, ops, arg, perm, level, flags, data) \
/* Default value instead of permissions? */ \
static const char __param_str_##name[] = prefix #name; \
static struct kernel_param __moduleparam_const __param_##name \
__used __section("__param") \
__aligned(__alignof__(struct kernel_param)) \
= { __param_str_##name, THIS_MODULE, ops, \
- VERIFY_OCTAL_PERMISSIONS(perm), level, flags, { arg } }
+ VERIFY_OCTAL_PERMISSIONS(perm), level, flags, { arg }, data }
/* Obsolete - use module_param_cb() */
#define module_param_call(name, _set, _get, arg, perm) \
--
2.31.1
next prev parent reply other threads:[~2021-07-31 21:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-31 21:41 [PATCH v4 0/7] drm: use dyndbg in drm_print Jim Cromie
2021-07-31 21:41 ` [PATCH v4 1/7] drm/print: fixup spelling in a comment Jim Cromie
2021-07-31 21:41 ` Jim Cromie [this message]
2021-08-02 16:18 ` [PATCH v4 2/7] moduleparam: add data member to struct kernel_param Emil Velikov
2021-08-02 18:36 ` jim.cromie
2021-07-31 21:42 ` [PATCH v4 3/7] dyndbg: add dyndbg-bitmap definer and callbacks Jim Cromie
2021-08-02 16:24 ` [Intel-gfx] " Emil Velikov
2021-08-02 18:40 ` jim.cromie
2021-07-31 21:42 ` [PATCH v4 4/7] i915/gvt: remove spaces in pr_debug "gvt: core:" etc prefixes Jim Cromie
2021-07-31 21:42 ` [PATCH v4 5/7] i915/gvt: control pr_debug("gvt:")s with bits in parameters/debug_gvt Jim Cromie
2021-08-02 16:27 ` Emil Velikov
2021-07-31 21:42 ` [PATCH v4 6/7] drm/print: add choice to use dynamic debug in drm-debug Jim Cromie
2021-07-31 21:42 ` [PATCH v4 7/7] amdgpu: define a dydbg-bitmap to control categorized pr_debugs Jim Cromie
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