Merge remote-tracking branch 'lineage-sm8250/lineage-20' into android16

Signed-off-by: Joe7500 <j7545032@gmail.com>

Author: Joe7500

.clang-format

@@ -213,6 +213,7 @@ ForEachMacros:
   - 'for_each_set_bit'
   - 'for_each_set_bit_from'
   - 'for_each_sg'
+  - 'for_each_sg_dma_page'
   - 'for_each_sg_page'
   - '__for_each_thread'
   - 'for_each_thread'

Documentation/ABI/testing/ima_policy

@@ -29,6 +29,7 @@ Description:
 		base: 	func:= [BPRM_CHECK][MMAP_CHECK][CREDS_CHECK][FILE_CHECK][MODULE_CHECK]
 				[FIRMWARE_CHECK]
 				[KEXEC_KERNEL_CHECK] [KEXEC_INITRAMFS_CHECK]
+				[KEXEC_CMDLINE]
 			mask:= [[^]MAY_READ] [[^]MAY_WRITE] [[^]MAY_APPEND]
 			       [[^]MAY_EXEC]
 			fsmagic:= hex value

Documentation/ABI/testing/sysfs-kernel-btf

@@ -15,3 +15,11 @@ Description:
 		information with description of all internal kernel types. See
 		Documentation/bpf/btf.rst for detailed description of format
 		itself.
+
+What:		/sys/kernel/btf/<module-name>
+Date:		Nov 2020
+KernelVersion:	5.11
+Contact:	bpf@vger.kernel.org
+Description:
+		Read-only binary attribute exposing kernel module's BTF type
+		information as an add-on to the kernel's BTF (/sys/kernel/btf/vmlinux).

Documentation/ABI/testing/sysfs-kernel-dmabuf-buffers

@@ -0,0 +1,24 @@
+What:		/sys/kernel/dmabuf/buffers
+Date:		January 2021
+KernelVersion:	v5.12
+Contact:	Hridya Valsaraju <hridya@google.com>
+Description:	The /sys/kernel/dmabuf/buffers directory contains a
+		snapshot of the internal state of every DMA-BUF.
+		/sys/kernel/dmabuf/buffers/<inode_number> will contain the
+		statistics for the DMA-BUF with the unique inode number
+		<inode_number>
+Users:		kernel memory tuning/debugging tools
+
+What:		/sys/kernel/dmabuf/buffers/<inode_number>/exporter_name
+Date:		January 2021
+KernelVersion:	v5.12
+Contact:	Hridya Valsaraju <hridya@google.com>
+Description:	This file is read-only and contains the name of the exporter of
+		the DMA-BUF.
+
+What:		/sys/kernel/dmabuf/buffers/<inode_number>/size
+Date:		January 2021
+KernelVersion:	v5.12
+Contact:	Hridya Valsaraju <hridya@google.com>
+Description:	This file is read-only and specifies the size of the DMA-BUF in
+		bytes.

Documentation/ABI/testing/sysfs-kernel-dmaheap

@@ -0,0 +1,7 @@
+What:		/sys/kernel/dma_heap/total_pools_kb
+Date:		Feb 2021
+KernelVersion:	5.10
+Contact:	Hridya Valsaraju <hridya@google.com>,
+Description:
+		The total_pools_kb file is read-only and specifies how much
+		memory in Kb is allocated to DMA-BUF heap pools.

Documentation/bpf/bpf_design_QA.rst

@@ -164,6 +164,12 @@ kernels. The union bpf_attr -> kern_version is checked at load time
 to prevent accidentally loading kprobe-based bpf programs written
 for a different kernel. Networking programs don't do kern_version check.
 
+Q: Are tracepoints part of the stable ABI?
+------------------------------------------
+A: NO. Tracepoints are tied to internal implementation details hence they are
+subject to change and can break with newer kernels. BPF programs need to change
+accordingly when this happens.
+
 Q: How much stack space a BPF program uses?
 -------------------------------------------
 A: Currently all program types are limited to 512 bytes of stack