[vmalloc]
Introduce vcalloc, I only really want it to automate the size overflow
check when allocating arrays.
--- a/include/linux/vmalloc.h Tue Oct 15 18:24:33 2002
+++ b/include/linux/vmalloc.h Tue Oct 15 18:24:33 2002
@@ -24,6 +24,7 @@
extern void *vmalloc(unsigned long size);
extern void *vmalloc_32(unsigned long size);
extern void *__vmalloc(unsigned long size, int gfp_mask, pgprot_t prot);
+extern void *vcalloc(unsigned long nmemb, unsigned long elem_size);
extern void vfree(void *addr);
extern void *vmap(struct page **pages, unsigned int count);
--- a/kernel/ksyms.c Tue Oct 15 18:24:33 2002
+++ b/kernel/ksyms.c Tue Oct 15 18:24:33 2002
@@ -108,6 +108,7 @@
EXPORT_SYMBOL(kfree);
EXPORT_SYMBOL(vfree);
EXPORT_SYMBOL(__vmalloc);
+EXPORT_SYMBOL(vcalloc);
EXPORT_SYMBOL(vmalloc);
EXPORT_SYMBOL(vmalloc_32);
EXPORT_SYMBOL(vmap);
--- a/mm/vmalloc.c Tue Oct 15 18:24:33 2002
+++ b/mm/vmalloc.c Tue Oct 15 18:24:33 2002
@@ -520,3 +520,22 @@
read_unlock(&vmlist_lock);
return buf - buf_start;
}
+
+void *vcalloc(unsigned long nmemb, unsigned long elem_size)
+{
+ unsigned long size;
+ void *addr;
+
+ /*
+ * Check that we're not going to overflow.
+ */
+ if (nmemb > (ULONG_MAX / elem_size))
+ return NULL;
+
+ size = nmemb * elem_size;
+ addr = vmalloc(size);
+ if (addr)
+ memset(addr, 0, size);
+
+ return addr;
+}
-
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This archive was generated by hypermail 2b29 : Tue Oct 15 2002 - 22:00:56 EST