Bjorn Helgaas c7c90e121e kconfig.h: explain IS_MODULE(), IS_ENABLED() ... Extend IS_MODULE() and IS_ENABLED comments to explain why one might use "#if IS_ENABLED(CONFIG_FOO)" instead of "#ifdef CONFIG_FOO". To wit, "#ifdef CONFIG_FOO" is true only for CONFIG_FOO=y, while "#if IS_ENABLED(CONFIG_FOO)" is true for both CONFIG_FOO=y and CONFIG_FOO=m. This is because "CONFIG_FOO=m" in .config does not result in "CONFIG_FOO" being defined. The actual definitions are in autoconf.h, where: CONFIG_FOO=y results in #define CONFIG_FOO 1 CONFIG_FOO=m results in #define CONFIG_FOO_MODULE 1 Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>		2021-06-05 23:49:46 +09:00
..
acpi
asm-generic	mm: remove xlate_dev_kmem_ptr()	2021-05-07 00:26:34 -07:00
clocksource
crypto
drm
dt-bindings	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2021-05-06 23:37:55 -07:00
keys	integrity-v5.13	2021-05-01 15:32:18 -07:00
kunit
kvm
linux	kconfig.h: explain IS_MODULE(), IS_ENABLED()	2021-06-05 23:49:46 +09:00
math-emu
media
memory
misc
net	mm: fix struct page layout on 32-bit systems	2021-05-14 19:41:32 -07:00
pcmcia
ras
rdma
scsi
soc
sound
target
trace	NFS client updates for Linux 5.13	2021-05-07 11:23:41 -07:00
uapi	Merge branch 'for-v5.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2021-05-21 06:12:52 -10:00
vdso
video
xen	xen/arm: move xen_swiotlb_detect to arm/swiotlb-xen.h	2021-05-14 15:52:05 +02:00