Christian Bremvåg kimocoder

## 8GB_android-11_compilation-note
Workarounds for building R on 8GB RAM environment:

1. At the start of the build:
[ 99% 138/139] /mnt/ssd/lineage/out/soong/.bootstrap/bin/soong_build /mnt/ssd/lineage/out/soong/build.ninja
This used to take around 30mins, after enabling zram now it takes around 30secs (thanks to @kdrag0n for the zram idea) which is on par with what happens in 16GB RAM building environments

sudo apt install zram-config for installing zram-config package
sudo nano /etc/fstab and add a # in front of the swap disk if you have one and then reboot
After booting cat /proc/swaps to check if zram is enabled or not

## atheros-bluetooth-kernel-4.13.md

      
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                / atheros-bluetooth-kernel-4.13.md
            
            
              Created
              November 4, 2017 15:24
            
              
                Fixing Atheros Killer / QCA Rome bluetooth chipset on kernel 4.13
              
          
    Fixing Bluetooth on certain Atheros chipsets

The Atheros Rome bluetooth chipset has been a huge headache under Linux due to Qualcomm reusing an ID code for this and an older chipset: https://bugs.launchpad.net/ubuntu/+source/bluez/+bug/1542743 among other sources
The fix for this in kernel 4.8 is available in that bug report, but it is not compatible with the new kernel 4.13.
Note: I didn't write any of this code, I'm just documenting a fix.
Included below is a modified version of btusb.c that is working. I've made some small patches based on the compile errors and the btusb.c from the 4.13 kernel. I did not patch everything; just the bits that were relevant to my install errors. You may wish to do a more complete patch if you experience stability issues. Install commands:

  
## build_boot.sh
#!/bin/sh

# mkbootfs ~/Downloads/samsung_t285_hacks/omni_root_test | minigzip > boot_kitchen/boot.img-ramdisk-new.gz

# mkbootfs /home/jedld/Downloads/samsung_t285_hacks/PURE_CM13/extracted/boot | minigzip > boot_kitchen/boot.img-ramdisk-new.gz
mkbootfs ~/android-work/out/target/product/gtexslte/root | minigzip > boot_kitchen/boot.img-ramdisk-new.gz

# mkbootfs boot_kitchen/boot | minigzip > boot_kitchen/boot.img-ramdisk-new.gz

# degas-mkbootimg -o boot.img --base 0 --pagesize 2048 \

## Makefile
CC = clang
CFLAGS =
DEPS =
OBJ = modexp2pubkey.o
LIBS = -lssl -lcrypto

%.o: %.c $(DEPS)
	$(CC) -c -o $@ $< $(CFLAGS)

modexp2pubkey: $(OBJ)
	Workarounds for building R on 8GB RAM environment:

	1. At the start of the build:
	[ 99% 138/139] /mnt/ssd/lineage/out/soong/.bootstrap/bin/soong_build /mnt/ssd/lineage/out/soong/build.ninja
	This used to take around 30mins, after enabling zram now it takes around 30secs (thanks to @kdrag0n for the zram idea) which is on par with what happens in 16GB RAM building environments

	sudo apt install zram-config for installing zram-config package
	sudo nano /etc/fstab and add a # in front of the swap disk if you have one and then reboot
	After booting cat /proc/swaps to check if zram is enabled or not
	#!/bin/sh

	# mkbootfs ~/Downloads/samsung_t285_hacks/omni_root_test \| minigzip > boot_kitchen/boot.img-ramdisk-new.gz

	# mkbootfs /home/jedld/Downloads/samsung_t285_hacks/PURE_CM13/extracted/boot \| minigzip > boot_kitchen/boot.img-ramdisk-new.gz
	mkbootfs ~/android-work/out/target/product/gtexslte/root \| minigzip > boot_kitchen/boot.img-ramdisk-new.gz

	# mkbootfs boot_kitchen/boot \| minigzip > boot_kitchen/boot.img-ramdisk-new.gz

	# degas-mkbootimg -o boot.img --base 0 --pagesize 2048 \
	CC = clang
	CFLAGS =
	DEPS =
	OBJ = modexp2pubkey.o
	LIBS = -lssl -lcrypto

	%.o: %.c $(DEPS)
	$(CC) -c -o $@ $< $(CFLAGS)

	modexp2pubkey: $(OBJ)