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9c29282ecb
Fix a warning.
v2: Avoid unmapping attachment repeatedly when ERESTARTSYS.
v3: Lock the BO before accessing ttm->sg to avoid race conditions.(Felix)
[ 41.708711] WARNING: CPU: 0 PID: 1463 at drivers/gpu/drm/ttm/ttm_bo.c:846 ttm_bo_validate+0x146/0x1b0 [ttm]
[ 41.708989] Call Trace:
[ 41.708992] <TASK>
[ 41.708996] ? show_regs+0x6c/0x80
[ 41.709000] ? ttm_bo_validate+0x146/0x1b0 [ttm]
[ 41.709008] ? __warn+0x93/0x190
[ 41.709014] ? ttm_bo_validate+0x146/0x1b0 [ttm]
[ 41.709024] ? report_bug+0x1f9/0x210
[ 41.709035] ? handle_bug+0x46/0x80
[ 41.709041] ? exc_invalid_op+0x1d/0x80
[ 41.709048] ? asm_exc_invalid_op+0x1f/0x30
[ 41.709057] ? amdgpu_amdkfd_gpuvm_dmaunmap_mem+0x2c/0x80 [amdgpu]
[ 41.709185] ? ttm_bo_validate+0x146/0x1b0 [ttm]
[ 41.709197] ? amdgpu_amdkfd_gpuvm_dmaunmap_mem+0x2c/0x80 [amdgpu]
[ 41.709337] ? srso_alias_return_thunk+0x5/0x7f
[ 41.709346] kfd_mem_dmaunmap_attachment+0x9e/0x1e0 [amdgpu]
[ 41.709467] amdgpu_amdkfd_gpuvm_dmaunmap_mem+0x56/0x80 [amdgpu]
[ 41.709586] kfd_ioctl_unmap_memory_from_gpu+0x1b7/0x300 [amdgpu]
[ 41.709710] kfd_ioctl+0x1ec/0x650 [amdgpu]
[ 41.709822] ? __pfx_kfd_ioctl_unmap_memory_from_gpu+0x10/0x10 [amdgpu]
[ 41.709945] ? srso_alias_return_thunk+0x5/0x7f
[ 41.709949] ? tomoyo_file_ioctl+0x20/0x30
[ 41.709959] __x64_sys_ioctl+0x9c/0xd0
[ 41.709967] do_syscall_64+0x3f/0x90
[ 41.709973] entry_SYSCALL_64_after_hwframe+0x6e/0xd8
Fixes:
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History
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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.