user/sven/linux.git/lib/genalloc.c, branch v3.18.40

lib/genalloc.c: export devm_gen_pool_create() for modules

2014-12-03T17:36:04Z

Modules can use this function for creating pool. Signed-off-by: Michal Simek Acked-by: Lad, Prabhakar Cc: Laura Abbott Cc: Olof Johansson Cc: Catalin Marinas Cc: Will Deacon Cc: Vladimir Zapolskiy Cc: Philipp Zabel Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: add genpool range check function

2014-10-10T02:25:52Z

After allocating an address from a particular genpool, there is no good way to verify if that address actually belongs to a genpool. Introduce addr_in_gen_pool which will return if an address plus size falls completely within the genpool range. Signed-off-by: Laura Abbott Acked-by: Will Deacon Reviewed-by: Olof Johansson Reviewed-by: Catalin Marinas Cc: Arnd Bergmann Cc: David Riley Cc: Ritesh Harjain Cc: Russell King Cc: Thierry Reding Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: add power aligned algorithm

2014-10-10T02:25:52Z

One of the more common algorithms used for allocation is to align the start address of the allocation to the order of size requested. Add this as an algorithm option for genalloc. Signed-off-by: Laura Abbott Acked-by: Will Deacon Acked-by: Olof Johansson Reviewed-by: Catalin Marinas Cc: Arnd Bergmann Cc: David Riley Cc: Ritesh Harjain Cc: Russell King Cc: Thierry Reding Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

genalloc: fix device node resource counter

2014-09-26T15:10:35Z

Decrement the np_pool device_node refcount, which was incremented on the preceding of_parse_phandle() call. Signed-off-by: Vladimir Zapolskiy Cc: Will Deacon Cc: Olof Johansson Cc: Catalin Marinas Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: add check gen_pool_dma_alloc() if dma pointer is not NULL

2014-01-30T00:22:39Z

In the gen_pool_dma_alloc() the dma pointer can be NULL and while assigning gen_pool_virt_to_phys(pool, vaddr) to dma caused the following crash on da850 evm: Unable to handle kernel NULL pointer dereference at virtual address 00000000 Internal error: Oops: 805 [#1] PREEMPT ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper Tainted: G W 3.13.0-rc1-00001-g0609e45-dirty #5 task: c4830000 ti: c4832000 task.ti: c4832000 PC is at gen_pool_dma_alloc+0x30/0x3c LR is at gen_pool_virt_to_phys+0x74/0x80 Process swapper, call trace: gen_pool_dma_alloc+0x30/0x3c davinci_pm_probe+0x40/0xa8 platform_drv_probe+0x1c/0x4c driver_probe_device+0x98/0x22c __driver_attach+0x8c/0x90 bus_for_each_dev+0x6c/0x8c bus_add_driver+0x124/0x1d4 driver_register+0x78/0xf8 platform_driver_probe+0x20/0xa4 davinci_init_late+0xc/0x14 init_machine_late+0x1c/0x28 do_one_initcall+0x34/0x15c kernel_init_freeable+0xe4/0x1ac kernel_init+0x8/0xec This patch fixes the above. [akpm@linux-foundation.org: update kerneldoc] Signed-off-by: Lad, Prabhakar Cc: Philipp Zabel Cc: Nicolin Chen Cc: Joe Perches Cc: Sachin Kamat Cc: [3.13.x] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc: add a helper function for DMA buffer allocation

2013-11-13T03:09:22Z

When using pool space for DMA buffer, there might be duplicated calling of gen_pool_alloc() and gen_pool_virt_to_phys() in each implementation. Thus it's better to add a simple helper function, a compatible one to the common dma_alloc_coherent(), to save some code. Signed-off-by: Nicolin Chen Cc: "Hans J. Koch" Cc: Dan Williams Cc: Eric Miao Cc: Grant Likely Cc: Greg Kroah-Hartman Cc: Haojian Zhuang Cc: Jaroslav Kysela Cc: Kevin Hilman Cc: Liam Girdwood Cc: Mark Brown Cc: Mauro Carvalho Chehab Cc: Rob Herring Cc: Russell King Cc: Sekhar Nori Cc: Takashi Iwai Cc: Vinod Koul Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: correct dev_get_gen_pool documentation

2013-09-11T22:58:38Z

The documentation mentions a "name" parameter, which does not exist. This commit removes such mention from the function documentation. Signed-off-by: Emilio López Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: convert kmalloc_node(...GFP_ZERO...) to kzalloc_node(...)

2013-09-11T22:58:13Z

Use the helper function instead of __GFP_ZERO. Signed-off-by: Joe Perches Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

lib/genalloc.c: fix overflow of ending address of memory chunk

2013-09-11T22:57:35Z

In struct gen_pool_chunk, end_addr means the end address of memory chunk (inclusive), but in the implementation it is treated as address + size of memory chunk (exclusive), so it points to the address plus one instead of correct ending address. The ending address of memory chunk plus one will cause overflow on the memory chunk including the last address of memory map, e.g. when starting address is 0xFFF00000 and size is 0x100000 on 32bit machine, ending address will be 0x100000000. Use correct ending address like starting address + size - 1. [akpm@linux-foundation.org: add comment to struct gen_pool_chunk:end_addr] Signed-off-by: Joonyoung Shim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

genalloc: add devres support, allow to find a managed pool by device

2013-04-30T01:28:13Z

This patch adds three exported functions to lib/genalloc.c: devm_gen_pool_create, dev_get_gen_pool, and of_get_named_gen_pool. devm_gen_pool_create is a managed version of gen_pool_create that keeps track of the pool via devres and allows the management code to automatically destroy it after device removal. dev_get_gen_pool retrieves the gen_pool for a given device, if it was created with devm_gen_pool_create, using devres_find. of_get_named_gen_pool retrieves the gen_pool for a given device node and property name, where the property must contain a phandle pointing to a platform device node. The corresponding platform device is then fed into dev_get_gen_pool and the resulting gen_pool is returned. [akpm@linux-foundation.org: make the of_get_named_gen_pool() stub static, fixing a zillion link errors] [akpm@linux-foundation.org: squish "struct device declared inside parameter list" warning] Signed-off-by: Philipp Zabel Acked-by: Grant Likely Tested-by: Michal Simek Cc: Fabio Estevam Cc: Matt Porter Cc: Dong Aisheng Cc: Greg Kroah-Hartman Cc: Rob Herring Cc: Paul Gortmaker Cc: Javier Martin Cc: Huang Shijie Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds