altstack: Don't use 0 pointer literals

[ccan] / ccan / altstack / altstack.c

diff --git a/ccan/altstack/altstack.c b/ccan/altstack/altstack.c
index 62db343cb2c9523a2d4ba11002c27d83c87ac43e..afee46e8a619c3d77c963f58feda7560e9debeb1 100644 (file)
--- a/ccan/altstack/altstack.c
+++ b/ccan/altstack/altstack.c
@@ -78,10 +78,10 @@ int altstack(rlim_t max, void *(*fn)(void *), void *arg, void **out)
 
        state.fn  = fn;
        state.arg = arg;
-       state.out = 0;
+       state.out = NULL;
        state.max = max;
        state.ebuf[state.elen = 0] = '\0';
-       if (out) *out = 0;
+       if (out) *out = NULL;
 
        // if the first page below the mapping is in use, we get max-pgsz usable bytes
        // add pgsz to max to guarantee at least max usable bytes
@@ -91,7 +91,7 @@ int altstack(rlim_t max, void *(*fn)(void *), void *arg, void **out)
        ok(setrlimit(RLIMIT_STACK, &(struct rlimit) { state.max, rl_save.rlim_max }), 1);
        undo++;
 
-       ok(m = mmap(0, max, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_GROWSDOWN|MAP_NORESERVE, -1, 0), 1);
+       ok(m = mmap(NULL, max, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_GROWSDOWN|MAP_NORESERVE, -1, 0), 1);
        undo++;
 
        if (setjmp(state.jmp) == 0) {
@@ -130,9 +130,9 @@ out:
 
        switch (undo) {
        case 4:
-               ok(sigaction(SIGSEGV, &sa_save, 0), 0);
+               ok(sigaction(SIGSEGV, &sa_save, NULL), 0);
        case 3:
-               ok(sigaltstack(&ss_save, 0), 0);
+               ok(sigaltstack(&ss_save, NULL), 0);
        case 2:
                ok(munmap(m, max), 0);
        case 1: