[PATCH] drm/ttm: check if free mem space is under the lower limit

[kbuild test robot]

Hi Roger,

I love your patch! Yet something to improve:

[auto build test ERROR on drm/drm-next]
[also build test ERROR on v4.16-rc2 next-20180223]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Roger-He/drm-ttm-check-if-free-mem-space-is-under-the-lower-limit/20180225-033957
base:   git://people.freedesktop.org/~airlied/linux.git drm-next
config: x86_64-rhel (attached as .config)
compiler: gcc-7 (Debian 7.3.0-1) 7.3.0
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   drivers/gpu//drm/ttm/ttm_memory.c: In function 'ttm_check_under_lowerlimit':
>> drivers/gpu//drm/ttm/ttm_memory.c:552:9: error: 'struct ttm_operation_ctx' has no member named 'flags'
     if (ctx->flags & TTM_OPT_FLAG_FORCE_ALLOC)
            ^~
>> drivers/gpu//drm/ttm/ttm_memory.c:552:19: error: 'TTM_OPT_FLAG_FORCE_ALLOC' undeclared (first use in this function); did you mean 'TTM_PAGE_FLAG_ZERO_ALLOC'?
     if (ctx->flags & TTM_OPT_FLAG_FORCE_ALLOC)
                      ^~~~~~~~~~~~~~~~~~~~~~~~
                      TTM_PAGE_FLAG_ZERO_ALLOC
   drivers/gpu//drm/ttm/ttm_memory.c:552:19: note: each undeclared identifier is reported only once for each function it appears in

vim +552 drivers/gpu//drm/ttm/ttm_memory.c

   534	
   535	/*
   536	 * check if the available mem is under lower memory limit
   537	 *
   538	 * a. if no swap disk at all or free swap space is under swap_mem_limit
   539	 * but available system mem is bigger than sys_mem_limit, allow TTM
   540	 * allocation;
   541	 *
   542	 * b. if the available system mem is less than sys_mem_limit but free
   543	 * swap disk is bigger than swap_mem_limit, allow TTM allocation.
   544	 */
   545	bool
   546	ttm_check_under_lowerlimit(struct ttm_mem_global *glob,
   547				uint64_t num_pages,
   548				struct ttm_operation_ctx *ctx)
   549	{
   550		int64_t available;
   551	
 > 552		if (ctx->flags & TTM_OPT_FLAG_FORCE_ALLOC)
   553			return false;
   554	
   555		available = get_nr_swap_pages() + si_mem_available();
   556		available -= num_pages;
   557		if (available < glob->lower_mem_limit)
   558			return true;
   559	
   560		return false;
   561	}
   562	EXPORT_SYMBOL(ttm_check_under_lowerlimit);
   563	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation
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