svn commit: r340996 - in head/sys: amd64/amd64 amd64/ia32 i386/i386 kern

[Eric van Gyzen]

Author: vangyzen
Date: Mon Nov 26 20:56:05 2018
New Revision: 340996
URL: https://svnweb.freebsd.org/changeset/base/340996

Log:
  Remove superfluous bzero in getcontext/swapcontext/sendsig
  
  We zero the whole structure; we don't need to zero the __spare__ field again.
  
  Remove trailing whitespace.
  
  MFC after:	2 weeks
  Sponsored by:	Dell EMC Isilon

Modified:
  head/sys/amd64/amd64/machdep.c
  head/sys/amd64/ia32/ia32_signal.c
  head/sys/i386/i386/machdep.c
  head/sys/kern/kern_context.c

Modified: head/sys/amd64/amd64/machdep.c
==============================================================================
--- head/sys/amd64/amd64/machdep.c	Mon Nov 26 20:52:53 2018	(r340995)
+++ head/sys/amd64/amd64/machdep.c	Mon Nov 26 20:56:05 2018	(r340996)
@@ -392,7 +392,6 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask
 	sf.sf_uc.uc_mcontext.mc_gsbase = pcb->pcb_gsbase;
 	bzero(sf.sf_uc.uc_mcontext.mc_spare,
 	    sizeof(sf.sf_uc.uc_mcontext.mc_spare));
-	bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__));
 
 	/* Allocate space for the signal handler context. */
 	if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&

Modified: head/sys/amd64/ia32/ia32_signal.c
==============================================================================
--- head/sys/amd64/ia32/ia32_signal.c	Mon Nov 26 20:52:53 2018	(r340995)
+++ head/sys/amd64/ia32/ia32_signal.c	Mon Nov 26 20:56:05 2018	(r340996)
@@ -266,7 +266,6 @@ freebsd32_getcontext(struct thread *td, struct freebsd
 		PROC_LOCK(td->td_proc);
 		uc.uc_sigmask = td->td_sigmask;
 		PROC_UNLOCK(td->td_proc);
-		bzero(&uc.__spare__, sizeof(uc.__spare__));
 		ret = copyout(&uc, uap->ucp, UC_COPY_SIZE);
 	}
 	return (ret);
@@ -276,7 +275,7 @@ int
 freebsd32_setcontext(struct thread *td, struct freebsd32_setcontext_args *uap)
 {
 	struct ia32_ucontext uc;
-	int ret;	
+	int ret;
 
 	if (uap->ucp == NULL)
 		ret = EINVAL;
@@ -297,7 +296,7 @@ int
 freebsd32_swapcontext(struct thread *td, struct freebsd32_swapcontext_args *uap)
 {
 	struct ia32_ucontext uc;
-	int ret;	
+	int ret;
 
 	if (uap->oucp == NULL || uap->ucp == NULL)
 		ret = EINVAL;
@@ -622,7 +621,6 @@ ia32_sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t 
 	fpstate_drop(td);
 	sf.sf_uc.uc_mcontext.mc_fsbase = td->td_pcb->pcb_fsbase;
 	sf.sf_uc.uc_mcontext.mc_gsbase = td->td_pcb->pcb_gsbase;
-	bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__));
 
 	/* Allocate space for the signal handler context. */
 	if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&

Modified: head/sys/i386/i386/machdep.c
==============================================================================
--- head/sys/i386/i386/machdep.c	Mon Nov 26 20:52:53 2018	(r340995)
+++ head/sys/i386/i386/machdep.c	Mon Nov 26 20:56:05 2018	(r340996)
@@ -645,7 +645,6 @@ sendsig(sig_t catcher, ksiginfo_t *ksi, sigset_t *mask
 	    sdp->sd_lobase;
 	bzero(sf.sf_uc.uc_mcontext.mc_spare2,
 	    sizeof(sf.sf_uc.uc_mcontext.mc_spare2));
-	bzero(sf.sf_uc.__spare__, sizeof(sf.sf_uc.__spare__));
 
 	/* Allocate space for the signal handler context. */
 	if ((td->td_pflags & TDP_ALTSTACK) != 0 && !oonstack &&

Modified: head/sys/kern/kern_context.c
==============================================================================
--- head/sys/kern/kern_context.c	Mon Nov 26 20:52:53 2018	(r340995)
+++ head/sys/kern/kern_context.c	Mon Nov 26 20:56:05 2018	(r340996)
@@ -75,7 +75,6 @@ sys_getcontext(struct thread *td, struct getcontext_ar
 		PROC_LOCK(td->td_proc);
 		uc.uc_sigmask = td->td_sigmask;
 		PROC_UNLOCK(td->td_proc);
-		bzero(uc.__spare__, sizeof(uc.__spare__));
 		ret = copyout(&uc, uap->ucp, UC_COPY_SIZE);
 	}
 	return (ret);
@@ -85,7 +84,7 @@ int
 sys_setcontext(struct thread *td, struct setcontext_args *uap)
 {
 	ucontext_t uc;
-	int ret;	
+	int ret;
 
 	if (uap->ucp == NULL)
 		ret = EINVAL;
@@ -106,14 +105,13 @@ int
 sys_swapcontext(struct thread *td, struct swapcontext_args *uap)
 {
 	ucontext_t uc;
-	int ret;	
+	int ret;
 
 	if (uap->oucp == NULL || uap->ucp == NULL)
 		ret = EINVAL;
 	else {
 		bzero(&uc, sizeof(ucontext_t));
 		get_mcontext(td, &uc.uc_mcontext, GET_MC_CLEAR_RET);
-		bzero(uc.__spare__, sizeof(uc.__spare__));
 		PROC_LOCK(td->td_proc);
 		uc.uc_sigmask = td->td_sigmask;
 		PROC_UNLOCK(td->td_proc);