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Fri, 14 Aug 2020 15:10:12 +0000 (GMT) Received: from d06av23.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B35C4A405D; Fri, 14 Aug 2020 15:10:11 +0000 (GMT) Received: from ibm-vm.ibmuc.com (unknown [9.145.4.223]) by d06av23.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 14 Aug 2020 15:10:11 +0000 (GMT) From: Claudio Imbrenda To: kvm@vger.kernel.org, pbonzini@redhat.com Cc: frankja@linux.ibm.com, david@redhat.com, thuth@redhat.com, cohuck@redhat.com, lvivier@redhat.com Subject: [kvm-unit-tests RFC v1 3/5] lib/alloc: simplify free and malloc Date: Fri, 14 Aug 2020 17:10:07 +0200 Message-Id: <20200814151009.55845-4-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200814151009.55845-1-imbrenda@linux.ibm.com> References: <20200814151009.55845-1-imbrenda@linux.ibm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.235,18.0.687 definitions=2020-08-14_09:2020-08-14,2020-08-14 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 spamscore=0 clxscore=1015 suspectscore=2 impostorscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 phishscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2008140114 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Remove the size parameter from the various free functions Since the backends can handle the allocation sizes on their own, simplify the generic malloc wrappers. Signed-off-by: Claudio Imbrenda --- lib/alloc.h | 2 +- lib/alloc_page.h | 6 +++--- lib/alloc.c | 42 +++++------------------------------------- lib/alloc_page.c | 2 +- lib/s390x/smp.c | 4 ++-- lib/vmalloc.c | 2 +- s390x/smp.c | 4 ++-- 7 files changed, 15 insertions(+), 47 deletions(-) diff --git a/lib/alloc.h b/lib/alloc.h index c44d459..9b4b634 100644 --- a/lib/alloc.h +++ b/lib/alloc.h @@ -24,7 +24,7 @@ struct alloc_ops { void *(*memalign)(size_t alignment, size_t size); - void (*free)(void *ptr, size_t size); + void (*free)(void *ptr); size_t align_min; }; diff --git a/lib/alloc_page.h b/lib/alloc_page.h index 6472abd..26caefe 100644 --- a/lib/alloc_page.h +++ b/lib/alloc_page.h @@ -62,18 +62,18 @@ void *alloc_pages(unsigned int order); * alloc_pages* functions. * The pointer must point to the start of the block. */ -void free_pages(void *mem, size_t size); +void free_pages(void *mem); /* For backwards compatibility */ static inline void free_page(void *mem) { - return free_pages(mem, 1); + return free_pages(mem); } /* For backwards compatibility */ static inline void free_pages_by_order(void *mem, unsigned int order) { - free_pages(mem, 1ull << order); + free_pages(mem); } #endif diff --git a/lib/alloc.c b/lib/alloc.c index 9d89d24..a46f464 100644 --- a/lib/alloc.c +++ b/lib/alloc.c @@ -50,56 +50,24 @@ void *calloc(size_t nmemb, size_t size) return ptr; } -#define METADATA_EXTRA (2 * sizeof(uintptr_t)) -#define OFS_SLACK (-2 * sizeof(uintptr_t)) -#define OFS_SIZE (-sizeof(uintptr_t)) - -static inline void *block_begin(void *mem) -{ - uintptr_t slack = *(uintptr_t *)(mem + OFS_SLACK); - return mem - slack; -} - -static inline uintptr_t block_size(void *mem) -{ - return *(uintptr_t *)(mem + OFS_SIZE); -} - void free(void *ptr) { - if (!alloc_ops->free) - return; - - void *base = block_begin(ptr); - uintptr_t sz = block_size(ptr); - - alloc_ops->free(base, sz); + if (alloc_ops->free) + alloc_ops->free(ptr); } void *memalign(size_t alignment, size_t size) { void *p; - uintptr_t blkalign; - uintptr_t mem; if (!size) return NULL; - assert(alignment >= sizeof(void *) && is_power_of_2(alignment)); + assert(is_power_of_2(alignment)); assert(alloc_ops && alloc_ops->memalign); - size += alignment - 1; - blkalign = MAX(alignment, alloc_ops->align_min); - size = ALIGN(size + METADATA_EXTRA, alloc_ops->align_min); - p = alloc_ops->memalign(blkalign, size); + p = alloc_ops->memalign(alignment, size); assert(p); - /* Leave room for metadata before aligning the result. */ - mem = (uintptr_t)p + METADATA_EXTRA; - mem = ALIGN(mem, alignment); - - /* Write the metadata */ - *(uintptr_t *)(mem + OFS_SLACK) = mem - (uintptr_t)p; - *(uintptr_t *)(mem + OFS_SIZE) = size; - return (void *)mem; + return (void *)p; } diff --git a/lib/alloc_page.c b/lib/alloc_page.c index 7c91f91..0e720ad 100644 --- a/lib/alloc_page.c +++ b/lib/alloc_page.c @@ -260,7 +260,7 @@ static void _free_pages(void *mem) } while (coalesce(a, order, pfn, pfn2)); } -void free_pages(void *mem, size_t size) +void free_pages(void *mem) { spin_lock(&lock); _free_pages(mem); diff --git a/lib/s390x/smp.c b/lib/s390x/smp.c index d954094..1bee8a9 100644 --- a/lib/s390x/smp.c +++ b/lib/s390x/smp.c @@ -163,8 +163,8 @@ int smp_cpu_destroy(uint16_t addr) rc = smp_cpu_stop_nolock(addr, false); if (!rc) { cpu = smp_cpu_from_addr(addr); - free_pages(cpu->lowcore, 2 * PAGE_SIZE); - free_pages(cpu->stack, 4 * PAGE_SIZE); + free_pages(cpu->lowcore); + free_pages(cpu->stack); cpu->lowcore = (void *)-1UL; cpu->stack = (void *)-1UL; } diff --git a/lib/vmalloc.c b/lib/vmalloc.c index f72c5b3..55b7a74 100644 --- a/lib/vmalloc.c +++ b/lib/vmalloc.c @@ -159,7 +159,7 @@ static void *vm_memalign(size_t alignment, size_t size) return mem; } -static void vm_free(void *mem, size_t size) +static void vm_free(void *mem) { struct metadata *m; uintptr_t ptr, end; diff --git a/s390x/smp.c b/s390x/smp.c index ad30e3c..4ca1dce 100644 --- a/s390x/smp.c +++ b/s390x/smp.c @@ -143,7 +143,7 @@ static void test_store_status(void) sigp(1, SIGP_STORE_STATUS_AT_ADDRESS, (uintptr_t)status, NULL); while (!status->prefix) { mb(); } report(1, "status written"); - free_pages(status, PAGE_SIZE * 2); + free_pages(status); report_prefix_pop(); smp_cpu_stop(1); @@ -276,7 +276,7 @@ static void test_reset_initial(void) report_prefix_pop(); report(smp_cpu_stopped(1), "cpu stopped"); - free_pages(status, PAGE_SIZE); + free_pages(status); report_prefix_pop(); } -- 2.26.2