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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2006-04-10 22:53:39 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-11 06:18:37 -0700
commit87276f721a9407a4a152b09265dc079f37674672 (patch)
tree5034e88d6ee2769e76374494d5dec19234c8e09e
parentd84a19ce52a7b01dc7318ea3a8223dfe44cccb6f (diff)
[PATCH] uml: fix big stack user
Switch this proc from storing 4k of data (a whole path) on the stack to keeping it on the heap. Maybe it's not called in process context but only in early boot context (where in UML you have a normal process stack on the host) but just to be safe, fix it. While at it some little readability simplifications. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--arch/um/os-Linux/mem.c23
1 files changed, 13 insertions, 10 deletions
diff --git a/arch/um/os-Linux/mem.c b/arch/um/os-Linux/mem.c
index 6ab372da965..71bb90a7606 100644
--- a/arch/um/os-Linux/mem.c
+++ b/arch/um/os-Linux/mem.c
@@ -53,33 +53,36 @@ static void __init find_tempdir(void)
*/
int make_tempfile(const char *template, char **out_tempname, int do_unlink)
{
- char tempname[MAXPATHLEN];
+ char *tempname;
int fd;
+ tempname = malloc(MAXPATHLEN);
+
find_tempdir();
- if (*template != '/')
+ if (template[0] != '/')
strcpy(tempname, tempdir);
else
- *tempname = 0;
+ tempname[0] = '\0';
strcat(tempname, template);
fd = mkstemp(tempname);
if(fd < 0){
fprintf(stderr, "open - cannot create %s: %s\n", tempname,
strerror(errno));
- return -1;
+ goto out;
}
if(do_unlink && (unlink(tempname) < 0)){
perror("unlink");
- return -1;
+ goto out;
}
if(out_tempname){
- *out_tempname = strdup(tempname);
- if(*out_tempname == NULL){
- perror("strdup");
- return -1;
- }
+ *out_tempname = tempname;
+ } else {
+ free(tempname);
}
return(fd);
+out:
+ free(tempname);
+ return -1;
}
#define TEMPNAME_TEMPLATE "vm_file-XXXXXX"