selftests/powerpc: Fix to use ucontext_t instead of struct ucontext

Web:        https://git.kernel.org/torvalds/c/ecdf06e1ea5376bba03c155751f6869d3dfaa210
Commit:     ecdf06e1ea5376bba03c155751f6869d3dfaa210
Parent:     910961754572a2f4c83ad7e610d180e3e6c29bda
Refname:    refs/heads/master
Author:     Harish <[email protected]>
AuthorDate: Tue Feb 13 12:02:55 2018 +0530
Committer:  Michael Ellerman <[email protected]>
CommitDate: Tue Feb 13 22:44:18 2018 +1100

    selftests/powerpc: Fix to use ucontext_t instead of struct ucontext
    
    With glibc 2.26 'struct ucontext' is removed to improve POSIX
    compliance, which breaks powerpc/alignment_handler selftest. Fix the
    test by using ucontext_t. Tested on ppc, works with older glibc
    versions as well.
    
    Fixes the following:
      alignment_handler.c: In function ‘sighandler’:
      alignment_handler.c:68:5: error: dereferencing pointer to incomplete type ‘struct ucontext’
        ucp->uc_mcontext.gp_regs[PT_NIP] += 4;
    
    Signed-off-by: Harish <[email protected]>
    Signed-off-by: Michael Ellerman <[email protected]>
---
 tools/testing/selftests/powerpc/alignment/alignment_handler.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/powerpc/alignment/alignment_handler.c b/tools/testing/selftests/powerpc/alignment/alignment_handler.c
index 39fd362415cf..0f2698f9fd6d 100644
--- a/tools/testing/selftests/powerpc/alignment/alignment_handler.c
+++ b/tools/testing/selftests/powerpc/alignment/alignment_handler.c
@@ -57,7 +57,7 @@ volatile int gotsig;
 
 void sighandler(int sig, siginfo_t *info, void *ctx)
 {
-	struct ucontext *ucp = ctx;
+	ucontext_t *ucp = ctx;
 
 	if (!testing) {
 		signal(sig, SIG_DFL);
--
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