The patch titled Subject: introduce SIZE_MAX has been removed from the -mm tree. Its filename was introduce-size_max.patch This patch was dropped because it was merged into mainline or a subsystem tree The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ From: Xi Wang <xi.wang@xxxxxxxxx> Subject: introduce SIZE_MAX ULONG_MAX is often used to check for integer overflow when calculating allocation size. While ULONG_MAX happens to work on most systems, there is no guarantee that `size_t' must be the same size as `long'. This patch introduces SIZE_MAX, the maximum value of `size_t', to improve portability and readability for allocation size validation. Signed-off-by: Xi Wang <xi.wang@xxxxxxxxx> Acked-by: Alex Elder <elder@xxxxxxxxxxxxx> Cc: David Airlie <airlied@xxxxxxxx> Cc: Pekka Enberg <penberg@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- fs/ceph/snap.c | 2 +- include/drm/drm_mem_util.h | 4 ++-- include/linux/kernel.h | 1 + include/linux/slab.h | 2 +- 4 files changed, 5 insertions(+), 4 deletions(-) diff -puN fs/ceph/snap.c~introduce-size_max fs/ceph/snap.c --- a/fs/ceph/snap.c~introduce-size_max +++ a/fs/ceph/snap.c @@ -331,7 +331,7 @@ static int build_snap_context(struct cep /* alloc new snap context */ err = -ENOMEM; - if (num > (ULONG_MAX - sizeof(*snapc)) / sizeof(u64)) + if (num > (SIZE_MAX - sizeof(*snapc)) / sizeof(u64)) goto fail; snapc = kzalloc(sizeof(*snapc) + num*sizeof(u64), GFP_NOFS); if (!snapc) diff -puN include/drm/drm_mem_util.h~introduce-size_max include/drm/drm_mem_util.h --- a/include/drm/drm_mem_util.h~introduce-size_max +++ a/include/drm/drm_mem_util.h @@ -31,7 +31,7 @@ static __inline__ void *drm_calloc_large(size_t nmemb, size_t size) { - if (size != 0 && nmemb > ULONG_MAX / size) + if (size != 0 && nmemb > SIZE_MAX / size) return NULL; if (size * nmemb <= PAGE_SIZE) @@ -44,7 +44,7 @@ static __inline__ void *drm_calloc_large /* Modeled after cairo's malloc_ab, it's like calloc but without the zeroing. */ static __inline__ void *drm_malloc_ab(size_t nmemb, size_t size) { - if (size != 0 && nmemb > ULONG_MAX / size) + if (size != 0 && nmemb > SIZE_MAX / size) return NULL; if (size * nmemb <= PAGE_SIZE) diff -puN include/linux/kernel.h~introduce-size_max include/linux/kernel.h --- a/include/linux/kernel.h~introduce-size_max +++ a/include/linux/kernel.h @@ -35,6 +35,7 @@ #define LLONG_MAX ((long long)(~0ULL>>1)) #define LLONG_MIN (-LLONG_MAX - 1) #define ULLONG_MAX (~0ULL) +#define SIZE_MAX (~(size_t)0) #define STACK_MAGIC 0xdeadbeef diff -puN include/linux/slab.h~introduce-size_max include/linux/slab.h --- a/include/linux/slab.h~introduce-size_max +++ a/include/linux/slab.h @@ -242,7 +242,7 @@ size_t ksize(const void *); */ static inline void *kmalloc_array(size_t n, size_t size, gfp_t flags) { - if (size != 0 && n > ULONG_MAX / size) + if (size != 0 && n > SIZE_MAX / size) return NULL; return __kmalloc(n * size, flags); } _ Patches currently in -mm which might be from xi.wang@xxxxxxxxx are origin.patch linux-next.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html