add some comments about the mips ksigaction structure weirdness

[musl] / arch / mips / ksigaction.h

diff --git a/arch/mips/ksigaction.h b/arch/mips/ksigaction.h
index 648ce06..6d73164 100644 (file)
--- a/arch/mips/ksigaction.h
+++ b/arch/mips/ksigaction.h
@@ -2,5 +2,8 @@ struct k_sigaction {
        unsigned flags;
        void (*handler)(int);
        unsigned long mask[4];
+       /* The following field is past the end of the structure the
+        * kernel will read or write, and exists only to avoid having
+        * mips-specific preprocessor conditionals in sigaction.c. */
        void (*restorer)();
 };