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asm-generic: percpu: avoid Wshadow warning
Nesting macros that use the same local variable names causes warnings when building with "make W=2": include/asm-generic/percpu.h:117:14: warning: declaration of '__ret' shadows a previous local [-Wshadow] include/asm-generic/percpu.h:126:14: warning: declaration of '__ret' shadows a previous local [-Wshadow] These are fairly harmless, but since the warning comes from a global header, the warning happens every time the headers are included, which is fairly annoying. Rename the variables to avoid shadowing and shut up the warning. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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