Patch "parisc: Fix __ARCH_SI_PREAMBLE_SIZE" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

parisc: Fix __ARCH_SI_PREAMBLE_SIZE

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
parisc-fix-__arch_si_preamble_size.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Helge Deller <[email protected]>
Date: Sun, 10 Jan 2016 09:30:42 +0100
Subject: parisc: Fix __ARCH_SI_PREAMBLE_SIZE

From: Helge Deller <[email protected]>

commit e60fc5aa608eb38b47ba4ee058f306f739eb70a0 upstream.

On a 64bit kernel build the compiler aligns the _sifields union in the struct siginfo_t on a 64bit address. The __ARCH_SI_PREAMBLE_SIZE define compensates for this alignment and thus fixes the wait testcase of the strace package.

The symptoms of a wrong __ARCH_SI_PREAMBLE_SIZE value is that _sigchld.si_stime variable is missed to be copied and thus after a copy_siginfo() will have uninitialized values.

---
 arch/parisc/include/uapi/asm/siginfo.h |    4 ++++
 1 file changed, 4 insertions(+)

@@ -1,6 +1,10 @@
 #ifndef _PARISC_SIGINFO_H
 #define _PARISC_SIGINFO_H
 
+#if defined(__LP64__)
+#define __ARCH_SI_PREAMBLE_SIZE   (4 * sizeof(int))
+#endif
+
 #include <asm-generic/siginfo.h>
 
 #undef NSIGTRAP

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/parisc-protect-huge-page-pte-changes-with-spinlocks.patch queue-4.4/parisc-fix-__arch_si_preamble_size.patch