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SIGCHLD11arch/alpha/kernel/entry.S#define SIGCHLD  20
SIGCHLD32include/asm-alpha/signal.h#define SIGCHLD    20
SIGCHLD26include/asm-i386/signal.h#define SIGCHLD    17
SIGCHLD45include/asm-mips/signal.h#define SIGCHLD    18  /* Child status has changed (POSIX).  */
SIGCHLD26include/asm-ppc/signal.h#define SIGCHLD    17
SIGCHLD60include/asm-sparc/signal.h#define SIGCHLD    20