linux-toradex.git/usr/include, branch v7.0-rc5

kbuild: uapi: drop dependency on CC_CAN_LINK

2026-01-16T22:02:11+00:00

The header tests try to compile each header. Some UAPI headers depend on
libc headers so they need a full userspace toolchain to build. This
dependency is expressed in kconfig as a dependency on CC_CAN_LINK.
Many kernel builds do not satisfy CC_CAN_LINK as they only use a
minimal kernel (cross-) compiler. In those configurations the UAPI
headers are not tested at all.

However most UAPI headers do not even depend on any libc headers,
and such dependencies are undesired in any case. Also the static
analysis performed by headers_check.pl does not need CC_CAN_LINK.

Drop the hard dependency on CC_CAN_LINK and instead skip the affected
compilation step for exactly those headers which require libc.

Signed-off-by: Thomas Weißschuh 
Link: https://patch.msgid.link/20251223-uapi-nostdinc-v1-5-d91545d794f7@linutronix.de
Signed-off-by: Nathan Chancellor

kbuild: uapi: split out command conditions into variables

2026-01-06T22:07:32+00:00

The condition logic will become a bit more complicated.

Split them out into dedicated variables so they stay readable.

Signed-off-by: Thomas Weißschuh 
Link: https://patch.msgid.link/20251223-uapi-nostdinc-v1-4-d91545d794f7@linutronix.de
Signed-off-by: Nathan Chancellor

kbuild: uapi: don't compile test bpf_perf_event.h on xtensa

2026-01-06T22:07:32+00:00

The xtensa UAPI headers do not provide 'struct pt_regs',
triggering an error:

usr/include/linux/bpf_perf_event.h:14:28: error: field 'regs' has incomplete type

Disable the header tests for this file on xtensa.

Signed-off-by: Thomas Weißschuh 
Link: https://patch.msgid.link/20251223-uapi-nostdinc-v1-3-d91545d794f7@linutronix.de
Signed-off-by: Nathan Chancellor

kbuild: uapi: validate that headers do not use libc

2026-01-06T22:07:32+00:00

The UAPI headers should be self-contained. That means they should not
use other headers from libc. Currently this is not enforced and various
dependencies have crept in.

Add a check to make sure no new ones are added.

Signed-off-by: Thomas Weißschuh 
Link: https://patch.msgid.link/20251223-uapi-nostdinc-v1-1-d91545d794f7@linutronix.de
Signed-off-by: Nathan Chancellor

kbuild: uapi: Drop check_config()

2025-12-30T20:06:03+00:00

headers_install.sh already tests for CONFIG symbols. It does so in a
more comprehensive way, by only checking for references in code and
also running even if CONFIG_UAPI_HEADER_TEST is disabled.
And check_config() has been disabled any case.

Drop the pointless check.

Signed-off-by: Thomas Weißschuh 
Reviewed-by: Nicolas Schier 
Link: https://patch.msgid.link/20251230-uapi-check_config-v1-1-00ecec109f39@linutronix.de
Signed-off-by: Nathan Chancellor

kbuild: uapi: Drop types.h check from headers_check.pl

2025-11-08T11:18:00+00:00

Since commit d6fc9fcbaa65 ("kbuild: compile-test exported headers to
ensure they are self-contained"), the UAPI headers are compile tested
standalone with the compiler. This compile testing will catch a missing
include of types.h, making the types.h checking in headers_check.pl
originally added in commit 483b41218fa9 ("kbuild: add checks for include
of linux/types in userspace headers") obsolete.

Signed-off-by: Nathan Chancellor 
Reviewed-by: Thomas Weißschuh 
Link: https://patch.msgid.link/20251023-headers-pl-drop-check-sizes-v1-1-18bd21cf8f5e@kernel.org
Signed-off-by: Nicolas Schier

kbuild: uapi: reuse KBUILD_USERCFLAGS

2025-11-08T11:17:59+00:00

The toplevel Makefile already provides the compiler flags necessary to
build userspace applications for the target.

Make use of them instead of duplicating the logic.

Signed-off-by: Thomas Weißschuh 
Reviewed-by: Nathan Chancellor 
Link: https://patch.msgid.link/20251014-kbuild-uapi-usercflags-v1-1-c162f9059c47@linutronix.de
Signed-off-by: Nicolas Schier

kbuild: uapi: Strip comments before size type check

2025-10-06T18:31:19+00:00

On m68k, check_sizetypes in headers_check reports:

    ./usr/include/asm/bootinfo-amiga.h:17: found __[us]{8,16,32,64} type without #include 

This header file does not use any of the Linux-specific integer types,
but merely refers to them from comments, so this is a false positive.
As of commit c3a9d74ee413bdb3 ("kbuild: uapi: upgrade check_sizetypes()
warning to error"), this check was promoted to an error, breaking m68k
all{mod,yes}config builds.

Fix this by stripping simple comments before looking for Linux-specific
integer types.

Signed-off-by: Geert Uytterhoeven 
Reviewed-by: Thomas Weißschuh 
Link: https://patch.msgid.link/949f096337e28d50510e970ae3ba3ec9c1342ec0.1759753998.git.geert@linux-m68k.org
[nathan: Adjust comment and remove unnecessary escaping from slashes in
         regex]
Signed-off-by: Nathan Chancellor

kbuild: uapi: upgrade check_declarations() warning to error

2025-08-13T21:00:35+00:00

No problematic declarations exist anymore.

Make sure it stays this way.

Signed-off-by: Thomas Weißschuh 
Reviewed-by: Nicolas Schier 
Link: https://lore.kernel.org/r/20250813-kbuild-hdrtest-fixes-v2-5-8a7921ca3a03@linutronix.de
Signed-off-by: Nathan Chancellor

kbuild: uapi: upgrade check_sizetypes() warning to error

2025-08-13T21:00:34+00:00

No problematic type usages exist anymore.

Make sure it stays this way.

Signed-off-by: Thomas Weißschuh 
Reviewed-by: Nicolas Schier 
Link: https://lore.kernel.org/r/20250813-kbuild-hdrtest-fixes-v2-4-8a7921ca3a03@linutronix.de
Signed-off-by: Nathan Chancellor