lkml.org 
[lkml]   [2017]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] ARM32: Support mremap() for sigpage/vDSO
Hi Dmitry,

[auto build test WARNING on linus/master]
[also build test WARNING on v4.11-rc6 next-20170413]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Dmitry-Safonov/ARM32-Support-mremap-for-sigpage-vDSO/20170414-190018
config: arm-sunxi_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=arm

All warnings (new ones prefixed by >>):

arch/arm/kernel/vdso.c: In function 'vdso_mremap':
>> arch/arm/kernel/vdso.c:69:28: warning: assignment makes integer from pointer without a cast [-Wint-conversion]
current->mm->context.vdso = (void __user *)new_vma->vm_start;
^

vim +69 arch/arm/kernel/vdso.c

53 .name = "[vvar]",
54 .pages = &vdso_data_page,
55 };
56
57 static int vdso_mremap(const struct vm_special_mapping *sm,
58 struct vm_area_struct *new_vma)
59 {
60 unsigned long new_size = new_vma->vm_end - new_vma->vm_start;
61 unsigned long vdso_size;
62
63 /* without VVAR page */
64 vdso_size = (vdso_total_pages - 1) << PAGE_SHIFT;
65
66 if (vdso_size != new_size)
67 return -EINVAL;
68
> 69 current->mm->context.vdso = (void __user *)new_vma->vm_start;
70
71 return 0;
72 }
73
74 static struct vm_special_mapping vdso_text_mapping __ro_after_init = {
75 .name = "[vdso]",
76 .mremap = vdso_mremap,
77 };

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
[unhandled content-type:application/gzip]
\
 
 \ /
  Last update: 2017-04-14 15:21    [W:0.072 / U:0.820 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site