Merge tag 'for-linus' of https://github.com/openrisc/linux

Pull OpenRISC fix from Stafford Horne:

 - During the 6.4 cycle my fpu support work broke ABI compatibility in
   the sigcontext struct. This was noticed by musl libc developers after
   the release. This fix restores the ABI.

* tag 'for-linus' of https://github.com/openrisc/linux:
  openrisc: Union fpcsr and oldmask in sigcontext to unbreak userspace ABI

Author: torvalds

arch/openrisc/include/uapi/asm/sigcontext.h

@@ -28,8 +28,10 @@
 
 struct sigcontext {
 	struct user_regs_struct regs;  /* needs to be first */
-	struct __or1k_fpu_state fpu;
-	unsigned long oldmask;
+	union {
+		unsigned long fpcsr;
+		unsigned long oldmask;	/* unused */
+	};
 };
 
 #endif /* __ASM_OPENRISC_SIGCONTEXT_H */

arch/openrisc/kernel/signal.c

@@ -50,7 +50,7 @@ static int restore_sigcontext(struct pt_regs *regs,
 	err |= __copy_from_user(regs, sc->regs.gpr, 32 * sizeof(unsigned long));
 	err |= __copy_from_user(&regs->pc, &sc->regs.pc, sizeof(unsigned long));
 	err |= __copy_from_user(&regs->sr, &sc->regs.sr, sizeof(unsigned long));
-	err |= __copy_from_user(&regs->fpcsr, &sc->fpu.fpcsr, sizeof(unsigned long));
+	err |= __copy_from_user(&regs->fpcsr, &sc->fpcsr, sizeof(unsigned long));
 
 	/* make sure the SM-bit is cleared so user-mode cannot fool us */
 	regs->sr &= ~SPR_SR_SM;
@@ -113,7 +113,7 @@ static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)
 	err |= __copy_to_user(sc->regs.gpr, regs, 32 * sizeof(unsigned long));
 	err |= __copy_to_user(&sc->regs.pc, &regs->pc, sizeof(unsigned long));
 	err |= __copy_to_user(&sc->regs.sr, &regs->sr, sizeof(unsigned long));
-	err |= __copy_to_user(&sc->fpu.fpcsr, &regs->fpcsr, sizeof(unsigned long));
+	err |= __copy_to_user(&sc->fpcsr, &regs->fpcsr, sizeof(unsigned long));
 
 	return err;
 }