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x86/percpu: Make CONFIG_USE_X86_SEG_SUPPORT work with sparse

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Now that sparse builds enforce the usage of typeof_unqual() the casts in
__raw_cpu_read/write() cause sparse to emit tons of false postive
warnings:

 warning: cast removes address space '__percpu' of expression

Address this by annotating the casts with __force.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/87v7gz0yjv.ffs@tglx
Closes: https://lore.kernel.org/oe-kbuild-all/202601181733.YZOf9XU3-lkp@intel.com/
This commit is contained in:
Thomas Gleixner 2026-01-18 15:45:40 +01:00
parent fd69b2f7d5
commit bbef8e2c29
1 changed files with 4 additions and 4 deletions
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8
arch/x86/include/asm/percpu.h
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@ -137,12 +137,12 @@
#define __raw_cpu_read(size, qual, pcp) \
({ \
*(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)); \
*(qual __my_cpu_type(pcp) * __force)__my_cpu_ptr(&(pcp)); \
})
#define __raw_cpu_write(size, qual, pcp, val) \
do { \
*(qual __my_cpu_type(pcp) *)__my_cpu_ptr(&(pcp)) = (val); \
#define __raw_cpu_write(size, qual, pcp, val) \
do { \
*(qual __my_cpu_type(pcp) * __force)__my_cpu_ptr(&(pcp)) = (val); \
} while (0)
#define __raw_cpu_read_const(pcp) __raw_cpu_read(, , pcp)