Changes in Makefile

faabed29 - kbuild: introduce hostprogs-always-y and userprogs-always-y

Sat, 01 Aug 2020 12:27:18 +0000

kbuild: introduce hostprogs-always-y and userprogs-always-yTo build host programs, you need to add the program names to 'hostprogs'to use the necessary build rule, but it is not enough to build thembecause there is no dependency.There are two types of host programs: built as the prerequisite ofanother (e.g. gen_crc32table in lib/Makefile), or always built whenKbuild visits the Makefile (e.g. genksyms in scripts/genksyms/Makefile).The latter is typical in Makefiles under scripts/, which contains hostprograms globally used during the kernel build. To build them, you needto add them to both 'hostprogs' and 'always-y'.This commit adds hostprogs-always-y as a shorthand.The same applies to user programs. net/bpfilter/Makefile buildsbpfilter_umh on demand, hence always-y is unneeded. In contrast,programs under samples/ are added to both 'userprogs' and 'always-y'so they are always built when Kbuild visits the Makefiles.userprogs-always-y works as a shorthand.Signed-off-by: Masahiro Yamada Acked-by: Miguel Ojeda List of files: /linux-6.15/samples/watch_queue/Makefile

214377e9 - samples: watch_queue: build sample program for target architecture

Wed, 17 Jun 2020 02:08:38 +0000

samples: watch_queue: build sample program for target architectureThis userspace program includes UAPI headers exported to usr/include/.'make headers' always works for the target architecture (i.e. the samearchitecture as the kernel), so the sample program should be built forthe target as well. Kbuild now supports 'userprogs' for that.I also guarded the CONFIG option by 'depends on CC_CAN_LINK' because$(CC) may not provide libc.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/samples/watch_queue/Makefile

f5b5a164 - Add sample notification program

Tue, 14 Jan 2020 17:07:11 +0000

Add sample notification programThe sample program is run like: ./samples/watch_queue/watch_testand watches "/" for mount changes and the current session keyring for keychanges: # keyctl add user a a @s 1035096409 # keyctl unlink 1035096409 @sproducing: # ./watch_test read() = 16 NOTIFY[000]: ty=000001 sy=02 i=00000110 KEY 2ffc2e5d change=2[linked] aux=1035096409 read() = 16 NOTIFY[000]: ty=000001 sy=02 i=00000110 KEY 2ffc2e5d change=3[unlinked] aux=1035096409Other events may be produced, such as with a failing disk: read() = 22 NOTIFY[000]: ty=000003 sy=02 i=00000416 USB 3-7.7 dev-reset e=0 r=0 read() = 24 NOTIFY[000]: ty=000002 sy=06 i=00000418 BLOCK 00800050 e=6[critical medium] s=64000ef8This corresponds to: blk_update_request: critical medium error, dev sdf, sector 1677725432 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0in dmesg.Signed-off-by: David Howells List of files: /linux-6.15/samples/watch_queue/Makefile