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Date: Sat, 25 Jul 2020 10:48:54 +0800
From: kernel test robot <lkp@...el.com>
To: Roger Pau Monne <roger.pau@...rix.com>,
linux-kernel@...r.kernel.org
Cc: kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
Roger Pau Monne <roger.pau@...rix.com>,
Oleksandr Andrushchenko <oleksandr_andrushchenko@...m.com>,
David Airlie <airlied@...ux.ie>,
Daniel Vetter <daniel@...ll.ch>,
Boris Ostrovsky <boris.ostrovsky@...cle.com>,
Juergen Gross <jgross@...e.com>,
Stefano Stabellini <sstabellini@...nel.org>,
Dan Carpenter <error27@...il.com>, Wei Liu <wl@....org>
Subject: Re: [PATCH v2 4/4] xen: add helpers to allocate unpopulated memory
Hi Roger,
Thank you for the patch! Yet something to improve:
[auto build test ERROR on xen-tip/linux-next]
[also build test ERROR on linus/master v5.8-rc6 next-20200724]
[cannot apply to linux/master]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Roger-Pau-Monne/xen-balloon-fixes-for-memory-hotplug/20200724-204452
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
config: x86_64-allyesconfig (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 1d09ecf36175f7910ffedd6d497c07b5c74c22fb)
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install x86_64 cross compiling tool for clang build
# apt-get install binutils-x86-64-linux-gnu
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>
All errors (new ones prefixed by >>):
>> drivers/gpu/drm/xen/xen_drm_front_gem.c:102:9: error: implicit declaration of function 'xen_alloc_unpopulated_pages' [-Werror,-Wimplicit-function-declaration]
ret = xen_alloc_unpopulated_pages(xen_obj->num_pages,
^
>> drivers/gpu/drm/xen/xen_drm_front_gem.c:155:5: error: implicit declaration of function 'xen_free_unpopulated_pages' [-Werror,-Wimplicit-function-declaration]
xen_free_unpopulated_pages(xen_obj->num_pages,
^
2 errors generated.
vim +/xen_alloc_unpopulated_pages +102 drivers/gpu/drm/xen/xen_drm_front_gem.c
77
78 static struct xen_gem_object *gem_create(struct drm_device *dev, size_t size)
79 {
80 struct xen_drm_front_drm_info *drm_info = dev->dev_private;
81 struct xen_gem_object *xen_obj;
82 int ret;
83
84 size = round_up(size, PAGE_SIZE);
85 xen_obj = gem_create_obj(dev, size);
86 if (IS_ERR_OR_NULL(xen_obj))
87 return xen_obj;
88
89 if (drm_info->front_info->cfg.be_alloc) {
90 /*
91 * backend will allocate space for this buffer, so
92 * only allocate array of pointers to pages
93 */
94 ret = gem_alloc_pages_array(xen_obj, size);
95 if (ret < 0)
96 goto fail;
97
98 /*
99 * allocate ballooned pages which will be used to map
100 * grant references provided by the backend
101 */
> 102 ret = xen_alloc_unpopulated_pages(xen_obj->num_pages,
103 xen_obj->pages);
104 if (ret < 0) {
105 DRM_ERROR("Cannot allocate %zu ballooned pages: %d\n",
106 xen_obj->num_pages, ret);
107 gem_free_pages_array(xen_obj);
108 goto fail;
109 }
110
111 xen_obj->be_alloc = true;
112 return xen_obj;
113 }
114 /*
115 * need to allocate backing pages now, so we can share those
116 * with the backend
117 */
118 xen_obj->num_pages = DIV_ROUND_UP(size, PAGE_SIZE);
119 xen_obj->pages = drm_gem_get_pages(&xen_obj->base);
120 if (IS_ERR_OR_NULL(xen_obj->pages)) {
121 ret = PTR_ERR(xen_obj->pages);
122 xen_obj->pages = NULL;
123 goto fail;
124 }
125
126 return xen_obj;
127
128 fail:
129 DRM_ERROR("Failed to allocate buffer with size %zu\n", size);
130 return ERR_PTR(ret);
131 }
132
133 struct drm_gem_object *xen_drm_front_gem_create(struct drm_device *dev,
134 size_t size)
135 {
136 struct xen_gem_object *xen_obj;
137
138 xen_obj = gem_create(dev, size);
139 if (IS_ERR_OR_NULL(xen_obj))
140 return ERR_CAST(xen_obj);
141
142 return &xen_obj->base;
143 }
144
145 void xen_drm_front_gem_free_object_unlocked(struct drm_gem_object *gem_obj)
146 {
147 struct xen_gem_object *xen_obj = to_xen_gem_obj(gem_obj);
148
149 if (xen_obj->base.import_attach) {
150 drm_prime_gem_destroy(&xen_obj->base, xen_obj->sgt_imported);
151 gem_free_pages_array(xen_obj);
152 } else {
153 if (xen_obj->pages) {
154 if (xen_obj->be_alloc) {
> 155 xen_free_unpopulated_pages(xen_obj->num_pages,
156 xen_obj->pages);
157 gem_free_pages_array(xen_obj);
158 } else {
159 drm_gem_put_pages(&xen_obj->base,
160 xen_obj->pages, true, false);
161 }
162 }
163 }
164 drm_gem_object_release(gem_obj);
165 kfree(xen_obj);
166 }
167
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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