Messages in this thread |  | | From | Charlemagne Lasse <> | | Date | Sat, 30 Mar 2024 00:56:54 +0100 | | Subject | warning: cast removes address space '__percpu' of expression |
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After switching to linux 6.9-rc1, I get a lot of these errors (when compiling with cgcc/sparse):
/include/linux/netdevice.h:4033:17: warning: cast removes address space '__percpu' of expression
This is around code which wasn't changed and which correctly uses the per cpu helper. Sparse flags were -Wsparse-all for sparse 0.6.4 (latest release). Sparse was enabled via C=1 parameter and sparse was configured using CHECK="sparse -Wsparse-all"
Problem was introduced between commit 8ae292c66dcb ("x86/lib: Address kernel-doc warnings") and 3a1d3829e193 ("x86/percpu: Avoid sparse warning with cast to named address space").
I would even go as far as saying that 1ca3683cc6d2 ("x86/percpu: Enable named address spaces with known compiler version") together with 3a1d3829e193 ("x86/percpu: Avoid sparse warning with cast to named address space") triggered this problem
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