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Mon, 9 Jul 2018 12:20:18 +0000 (GMT) From: Marek Szyprowski To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, iommu@lists.linux-foundation.org Subject: [PATCH 1/2] mm/cma: remove unsupported gfp_mask parameter from cma_alloc() Date: Mon, 9 Jul 2018 14:19:55 +0200 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20180709121956.20200-1-m.szyprowski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA0WSe0yNcRzG/d57cex1snwXGzvmLmmYH1ku2fw2/7SZ/qgNJ71LU+G8KpeN dHRxpLkMSXSRcuqkpFoXt3OkY0UptEwJZXNrHZIO0XFer8t/n+d5vs+e3969Aq1N5XyEqNjd kiFWH63jPJnqxm8tvvSGoLCFpc3zcXaZhcOOpGQaDxSmI3w0v4jD5pJ7FDYfNXI493YAPnK+ nMfmG04Kf3nyisIVvR0sflyXzeEXFheLbadvIjwyPMri0oZuHvdkrMK59sMsvpDt5LDV0cfi wZYUHjd1D/L4/KEMhN99us+sAtJnvUgRy0ULIo872mhifW3jSPrHwyyp+HySJ6b+JxTp6rjB kfuZIwy5XnCQPB/tpcmpziJEWjPzEKl/lsiRqz/eU8Tc3sYHe4d6roiQoqPiJYNf4BbPbXV9 ZfzOunl70lsPMYkoZboJeQggLobn5gZeYa14BUHyIDIhTzd/QWB/M0ypYhBBYXEN+7fxIL+X V4MiBM6uN7QqhhDUd3cxyhUn+oOp38QpwUQxB8FLaxKrCFrsY+Gty+TuC4KXuBF6SpYoBUac ATmNZyh1YiqUlN+hFfYQAyGnwfV7AcRKAXpdPb8DjRgPqY4qRi2shVu1R/6wF7y3V/IqTwFX bQ6llo0IUjOzeFWkI6jKruHUqwC4a29jlRfR4hwoq/NT7dWQdsnIKTaI46Gzf4Ji0248WX2W Vm0NpKVo1euZkGW/+m/W+qidVpnA05sFrPqFTiAw9p9Ax9HUrP9juQgVo0lSnBwTKcn+sVLC AlkfI8fFRi7YuiOmArl/z+ZR++caNNQebkOigHTjNI5da8K0rD5e3htjQyDQuoka/XK3pYnQ 790nGXZsNsRFS7INTRYY3STNptkHQrVipH63tF2SdkqGvyklePgkolsFfnPHVPmHV3146/CJ uPazqdpn7brT90IbZ4VWpq18tiho2tNzHiFFrqX5rcGyV3NTHpdsHLgUnEEeljwc+zUubMWx pOCE/eudnVEBU44hY8InZ6n3mcQRy3fDMDMcctl3KCiwsSV/ZmdQx8vCOVuzktaMbfW2ty07 F2nyhcX7Iop1jLxN7z+XNsj6X0WxtcuaAwAA X-Brightmail-Tracker: H4sIAAAAAAAAAzVSa0hTYRj2O3etxWFaHSRIJlEYTudtn5YiRfIhBJIQpJYe9KCSc7UzJQtx WoodTazIzHtWyvKKXVAzyqWZFg5T1MgLNkEsreWiEkWbjv4973PhfeB9GVy+QLgzqel6QZfO pykoF+L9xsCMNxZ9PNZ3cTAEVrU1U9Cal4/DHw3FABbVN1LQ2NSPQWPRVQrWvToCr1e209DY 8xeDv8bmMNhhGSfhaHcVBWeaN0louvMSwLU/GyRs6Zum4WxJOKwbuEbC6qq/FOy1zpPQNlxA w6FpGw0rc0sAXPz5jgjn0HxvDYaaa5oBGh0fwVHvFxOFipeukahj5RaNpOUxDE2N91DoXfka gZ48zEGfNyw4uj3ZCJC5/D5ALz4ZKNS6/hVDxo8jdNSeGOVRnTZDL3ikaEV9qCJWBf2UqmCo 9AsIVqr81WdD/AIVPmFHk4S01ExB5xOWoEzpnm+jL3QfvlRsziUMoMBTAs4MxwZwH+ottARc GDn7CHCDc7m0Q9jHDZYZSAd25dbHJcphsgEud9i2LVCsipOWHYIb+wBwK5sj5NaAs79JzlJR TkiAYVzZaK5rSbMVINgDXO3bMmyLlrGhXMvqIceC/VxT+2t8CzuzYVxt3+Y2ltstBUtDRCnY VQecHgM3IUPUJGtEP6XIa8SM9GRlolbTAexHfv529WknkL5HmwDLAMVOmfXisVg5yWeKWRoT 4Bhc4SbjQ+yULInPuizotPG6jDRBNIFAe6ebuPvuRK39ZdL18apAlRoGq9T+av8gqNgrM/tm xcjZZF4vnBeEC4Lufw5jnN0NYCLihjKyckda3GRqdA8tXYma7bS2xK2dnlSUxOaHr8SfKYwI 9po+0RWeMhCRPZWTfTegpghVnBs2nGotDK1eeN+VndP07GDODXXd2vllo3laG+Lk88Yj6N6A zbfhJBqMJ/tLPa0fLCBvuICfCm1JMHtPtA5FSscmjmTPdWx+y1QQYgqv8sJ1Iv8Pb7wBTvoC AAA= Message-Id: <20180709122019eucas1p2340da484acfcc932537e6014f4fd2c29~-sqTPJKij2939229392eucas1p2j@eucas1p2.samsung.com> X-CMS-MailID: 20180709122019eucas1p2340da484acfcc932537e6014f4fd2c29 X-Msg-Generator: CA X-RootMTR: 20180709122019eucas1p2340da484acfcc932537e6014f4fd2c29 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20180709122019eucas1p2340da484acfcc932537e6014f4fd2c29 References: <20180709121956.20200-1-m.szyprowski@samsung.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180709_052044_290335_F4F21C2B X-CRM114-Status: GOOD ( 18.64 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Chris Zankel , Michal Hocko , Catalin Marinas , Joerg Roedel , Will Deacon , Russell King , Michal Nazarewicz , Sumit Semwal , Paul Mackerras , linaro-mm-sig@lists.linaro.org, Benjamin Herrenschmidt , Martin Schwidefsky , Joonsoo Kim , Andrew Morton , Laura Abbott , Robin Murphy , Christoph Hellwig , Vlastimil Babka , Marek Szyprowski MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP cma_alloc() function doesn't really support gfp flags other than __GFP_NOWARN, so convert gfp_mask parameter to boolean no_warn parameter. This will help to avoid giving false feeling that this function supports standard gfp flags and callers can pass __GFP_ZERO to get zeroed buffer, what has already been an issue: see commit dd65a941f6ba ("arm64: dma-mapping: clear buffers allocated with FORCE_CONTIGUOUS flag"). Signed-off-by: Marek Szyprowski Acked-by: Michal Hocko Acked-by: Laura Abbott Acked-by: Vlastimil Babka Reviewed-by: Christoph Hellwig --- arch/powerpc/kvm/book3s_hv_builtin.c | 2 +- drivers/s390/char/vmcp.c | 2 +- drivers/staging/android/ion/ion_cma_heap.c | 2 +- include/linux/cma.h | 2 +- kernel/dma/contiguous.c | 3 ++- mm/cma.c | 8 ++++---- mm/cma_debug.c | 2 +- 7 files changed, 11 insertions(+), 10 deletions(-) diff --git a/arch/powerpc/kvm/book3s_hv_builtin.c b/arch/powerpc/kvm/book3s_hv_builtin.c index d4a3f4da409b..fc6bb9630a9c 100644 --- a/arch/powerpc/kvm/book3s_hv_builtin.c +++ b/arch/powerpc/kvm/book3s_hv_builtin.c @@ -77,7 +77,7 @@ struct page *kvm_alloc_hpt_cma(unsigned long nr_pages) VM_BUG_ON(order_base_2(nr_pages) < KVM_CMA_CHUNK_ORDER - PAGE_SHIFT); return cma_alloc(kvm_cma, nr_pages, order_base_2(HPT_ALIGN_PAGES), - GFP_KERNEL); + false); } EXPORT_SYMBOL_GPL(kvm_alloc_hpt_cma); diff --git a/drivers/s390/char/vmcp.c b/drivers/s390/char/vmcp.c index 948ce82a7725..0fa1b6b1491a 100644 --- a/drivers/s390/char/vmcp.c +++ b/drivers/s390/char/vmcp.c @@ -68,7 +68,7 @@ static void vmcp_response_alloc(struct vmcp_session *session) * anymore the system won't work anyway. */ if (order > 2) - page = cma_alloc(vmcp_cma, nr_pages, 0, GFP_KERNEL); + page = cma_alloc(vmcp_cma, nr_pages, 0, false); if (page) { session->response = (char *)page_to_phys(page); session->cma_alloc = 1; diff --git a/drivers/staging/android/ion/ion_cma_heap.c b/drivers/staging/android/ion/ion_cma_heap.c index 49718c96bf9e..3fafd013d80a 100644 --- a/drivers/staging/android/ion/ion_cma_heap.c +++ b/drivers/staging/android/ion/ion_cma_heap.c @@ -39,7 +39,7 @@ static int ion_cma_allocate(struct ion_heap *heap, struct ion_buffer *buffer, if (align > CONFIG_CMA_ALIGNMENT) align = CONFIG_CMA_ALIGNMENT; - pages = cma_alloc(cma_heap->cma, nr_pages, align, GFP_KERNEL); + pages = cma_alloc(cma_heap->cma, nr_pages, align, false); if (!pages) return -ENOMEM; diff --git a/include/linux/cma.h b/include/linux/cma.h index bf90f0bb42bd..190184b5ff32 100644 --- a/include/linux/cma.h +++ b/include/linux/cma.h @@ -33,7 +33,7 @@ extern int cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, const char *name, struct cma **res_cma); extern struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, - gfp_t gfp_mask); + bool no_warn); extern bool cma_release(struct cma *cma, const struct page *pages, unsigned int count); extern int cma_for_each_area(int (*it)(struct cma *cma, void *data), void *data); diff --git a/kernel/dma/contiguous.c b/kernel/dma/contiguous.c index d987dcd1bd56..19ea5d70150c 100644 --- a/kernel/dma/contiguous.c +++ b/kernel/dma/contiguous.c @@ -191,7 +191,8 @@ struct page *dma_alloc_from_contiguous(struct device *dev, size_t count, if (align > CONFIG_CMA_ALIGNMENT) align = CONFIG_CMA_ALIGNMENT; - return cma_alloc(dev_get_cma_area(dev), count, align, gfp_mask); + return cma_alloc(dev_get_cma_area(dev), count, align, + gfp_mask & __GFP_NOWARN); } /** diff --git a/mm/cma.c b/mm/cma.c index 5809bbe360d7..4cb76121a3ab 100644 --- a/mm/cma.c +++ b/mm/cma.c @@ -395,13 +395,13 @@ static inline void cma_debug_show_areas(struct cma *cma) { } * @cma: Contiguous memory region for which the allocation is performed. * @count: Requested number of pages. * @align: Requested alignment of pages (in PAGE_SIZE order). - * @gfp_mask: GFP mask to use during compaction + * @no_warn: Avoid printing message about failed allocation * * This function allocates part of contiguous memory on specific * contiguous memory area. */ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, - gfp_t gfp_mask) + bool no_warn) { unsigned long mask, offset; unsigned long pfn = -1; @@ -447,7 +447,7 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, pfn = cma->base_pfn + (bitmap_no << cma->order_per_bit); mutex_lock(&cma_mutex); ret = alloc_contig_range(pfn, pfn + count, MIGRATE_CMA, - gfp_mask); + GFP_KERNEL | (no_warn ? __GFP_NOWARN : 0)); mutex_unlock(&cma_mutex); if (ret == 0) { page = pfn_to_page(pfn); @@ -466,7 +466,7 @@ struct page *cma_alloc(struct cma *cma, size_t count, unsigned int align, trace_cma_alloc(pfn, page, count, align); - if (ret && !(gfp_mask & __GFP_NOWARN)) { + if (ret && !no_warn) { pr_err("%s: alloc failed, req-size: %zu pages, ret: %d\n", __func__, count, ret); cma_debug_show_areas(cma); diff --git a/mm/cma_debug.c b/mm/cma_debug.c index f23467291cfb..ad6723e9d110 100644 --- a/mm/cma_debug.c +++ b/mm/cma_debug.c @@ -139,7 +139,7 @@ static int cma_alloc_mem(struct cma *cma, int count) if (!mem) return -ENOMEM; - p = cma_alloc(cma, count, 0, GFP_KERNEL); + p = cma_alloc(cma, count, 0, false); if (!p) { kfree(mem); return -ENOMEM;