From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sun, 3 Nov 2002 12:09:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sun, 3 Nov 2002 12:09:27 -0500 Received: from verein.lst.de ([212.34.181.86]:54027 "EHLO verein.lst.de") by vger.kernel.org with ESMTP id ; Sun, 3 Nov 2002 12:09:26 -0500 Date: Sun, 3 Nov 2002 18:15:55 +0100 From: Christoph Hellwig To: torvalds@transmeta.com Cc: linux-kernel@vger.kernel.org Subject: [PATCH] implement ksize() Message-ID: <20021103181555.A6977@lst.de> Mail-Followup-To: Christoph Hellwig , torvalds@transmeta.com, linux-kernel@vger.kernel.org Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org It's used to find out the effective allocation size of objects allocated by kmalloc(). This is needed by the uClinux ports in many places but seems also usefull for mmu-using ports. --- 1.13/include/linux/slab.h Wed Sep 25 20:41:05 2002 +++ edited/include/linux/slab.h Sun Nov 3 03:08:32 2002 @@ -60,6 +60,7 @@ extern void *kmalloc(size_t, int); extern void kfree(const void *); +extern unsigned int ksize(const void *); extern int FASTCALL(kmem_cache_reap(int)); --- 1.156/kernel/ksyms.c Thu Oct 31 10:28:34 2002 +++ edited/kernel/ksyms.c Sun Nov 3 03:09:00 2002 @@ -104,6 +104,7 @@ EXPORT_SYMBOL(remove_shrinker); EXPORT_SYMBOL(kmalloc); EXPORT_SYMBOL(kfree); +EXPORT_SYMBOL(ksize); EXPORT_SYMBOL(vfree); EXPORT_SYMBOL(__vmalloc); EXPORT_SYMBOL(vmalloc); --- 1.46/mm/slab.c Fri Nov 1 16:34:38 2002 +++ edited/mm/slab.c Sun Nov 3 13:18:29 2002 @@ -1871,6 +1871,22 @@ return cachep->objsize; } +unsigned int ksize(const void *objp) +{ + kmem_cache_t *c; + unsigned long flags; + unsigned int size = 0; + + if (objp) { + local_irq_save(flags); + c = GET_PAGE_CACHE(virt_to_page(objp)); + size = kmem_cache_size(c); + local_irq_restore(flags); + } + + return size; +} + kmem_cache_t * kmem_find_general_cachep (size_t size, int gfpflags) { struct cache_sizes *csizep = malloc_sizes;