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a357dca964
This patch will fix the page fault caused by uninitialized variables. Error Log: ...... [ 130.246323] [drm] GART: num cpu pages 131072, num gpu pages 131072 [ 131.963112] [drm] PCIE GART of 512M enabled (table at 0x0000008000000000). [ 131.963130] BUG: unable to handle page fault for address: 000000000002db80 [ 131.963181] #PF: supervisor write access in kernel mode [ 131.963210] #PF: error_code(0x0002) - not-present page [ 131.963233] PGD 0 P4D 0 [ 131.963253] Oops: 0002 [#1] SMP NOPTI [ 131.963273] CPU: 3 PID: 1411 Comm: modprobe Not tainted 5.13.0+ #1 [ 131.963338] RIP: 0010:osq_lock+0x4d/0x120 [ 131.963381] Code: 10 00 00 00 00 48 c7 02 00 00 00 00 89 42 14 87 07 85 c0 0f 84 d0 00 00 00 83 e8 01 48 98 48 03 0c c5 00 d9 ea 9c 48 89 4a 08 <48> 89 11 44 8b 42 10 45 85 c0 0f 85 af 00 00 00 55 48 89 fe 65 4c [ 131.963460] RSP: 0018:ffffa40481717768 EFLAGS: 00010202 [ 131.963483] RAX: fffffffffffffffe RBX: ffffa40481717920 RCX: 000000000002db80 [ 131.963520] RDX: ffff9256fecedb80 RSI: ffff9256cbed2e80 RDI: ffffa40481717ac4 [ 131.963547] RBP: ffffa40481717808 R08: ffffa40481717920 R09: 00000000ffffffff [ 131.963582] R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 [ 131.963609] R13: ffffa40481717ac4 R14: ffffa40481717ab8 R15: ffff9256c9480000 [ 131.963646] FS: 00007f23d9b9c540(0000) GS:ffff9256fecc0000(0000) knlGS:0000000000000000 [ 131.963687] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 131.963721] CR2: 000000000002db80 CR3: 0000000008444000 CR4: 00000000000506e0 [ 131.963758] Call Trace: [ 131.963772] ? __ww_mutex_lock.isra.0+0x3a2/0x760 [ 131.963810] ? prb_read_valid+0x1c/0x20 [ 131.963830] ? console_unlock+0x2fe/0x4f0 [ 131.963849] __ww_mutex_lock_interruptible_slowpath+0x16/0x20 [ 131.963882] ww_mutex_lock_interruptible+0x83/0x90 [ 131.963908] amdgpu_bo_create_reserved+0xf0/0x1e0 [amdgpu] [ 131.964237] amdgpu_bo_create_kernel+0x17/0x80 [amdgpu] [ 131.964509] amdgpu_gmc_vram_checking+0x41/0xf0 [amdgpu] [ 131.964807] gmc_v10_0_hw_init+0x105/0x120 [amdgpu] [ 131.965108] amdgpu_device_init.cold+0x1aa4/0x1e3e [amdgpu] ...... Signed-off-by: Xiaojian Du <Xiaojian.Du@amd.com> Reviewed-by: Yang Wang <kevinyang.wang@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.