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Michael Bommarito
91e901c65b
Building ARCH=um on glibc >= 2.43 fails:
arch/um/drivers/cow_user.c: error: implicit declaration of
function 'strrchr' [-Wimplicit-function-declaration]
glibc 2.43's C23 const-preserving strrchr() macro does not survive
UML's global -Dstrrchr=kernel_strrchr remap from arch/um/Makefile.
Call kernel_strrchr() directly in cow_user.c so the source no longer
depends on the -D rewrite.
Fixes: 2c51a4bc02 ("um: fix strrchr() problems")
Suggested-by: Johannes Berg <[email protected]>
Cc: [email protected]
Assisted-by: Claude:claude-opus-4-6
Assisted-by: Codex:gpt-5-4
Signed-off-by: Michael Bommarito <[email protected]>
Link: https://patch.msgid.link/[email protected]
[remove unnecessary 'extern']
Signed-off-by: Johannes Berg <[email protected]>