On Thu, Oct 08, 2020 at 09:19:47AM +0200, Christian König wrote: > Am 07.10.20 um 18:01 schrieb Gustavo A. R. Silva: > > Hi all, > > > > This series aims to replace one-element arrays with flexible-array > > members. > > > > There is a regular need in the kernel to provide a way to declare having > > a dynamically sized set of trailing elements in a structure. Kernel code > > should always use “flexible array members”[1] for these cases. The older > > style of one-element or zero-length arrays should no longer be used[2]. > > > > Refactor the code according to the use of flexible-array members, instead > > of one-element arrays, and use the struct_size() helper to calculate the > > size for the dynamic memory allocation. > > > > Also, save some heap space in the process. More on this on each individual > > patch. > > Ah! Nice to see that finally be documented and cleaned up. > > Feel free to add an Acked-by: Christian König <christian.koenig@xxxxxxx> > > I also know about a case where we don't use struct_size in the DMA-buf code. > > I'm the maintainer of that stuff as well, so be prepared to get patches > thrown at you to clean that up as well. No problem. Feel free to send all of those my way. :) Thanks -- Gustavo > > Thanks, > Christian. > > > > > This series also addresses multiple of the following sorts of warnings: > > > > drivers/gpu/drm/amd/amdgpu/../pm/powerplay/hwmgr/smu8_hwmgr.c:1515:37: > > warning: array subscript 1 is above array bounds of ‘const struct > > phm_clock_voltage_dependency_record[1]’ [-Warray-bounds] > > > > which, in this case, they are false positives, but nervertheless should be > > fixed in order to enable -Warray-bounds[3][4]. > > > > [1] https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FFlexible_array_member&data=02%7C01%7Cchristian.koenig%40amd.com%7C5312862a3b8c41838ef508d86ad969c1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637376829947099179&sdata=5LEWyR8pYSxmHsqhHiYiOS%2BPPk%2Fm5suOc6H7f5cIBL4%3D&reserved=0 > > [2] https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.kernel.org%2Fdoc%2Fhtml%2Fv5.9-rc1%2Fprocess%2Fdeprecated.html%23zero-length-and-one-element-arrays&data=02%7C01%7Cchristian.koenig%40amd.com%7C5312862a3b8c41838ef508d86ad969c1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637376829947099179&sdata=wOqxnNkA9FnOI%2BfB3dHn9RU7cqPJ62qqGCK9gsd2i%2Bo%3D&reserved=0 > > [3] https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgit.kernel.org%2Flinus%2F44720996e2d79e47d508b0abe99b931a726a3197&data=02%7C01%7Cchristian.koenig%40amd.com%7C5312862a3b8c41838ef508d86ad969c1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637376829947099179&sdata=x%2BSJeOrQA11HXoTaZEdyLyNWL9rC4GngDyoDMRBUn4M%3D&reserved=0 > > [4] https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FKSPP%2Flinux%2Fissues%2F109&data=02%7C01%7Cchristian.koenig%40amd.com%7C5312862a3b8c41838ef508d86ad969c1%7C3dd8961fe4884e608e11a82d994e183d%7C0%7C0%7C637376829947099179&sdata=48155uVo7AboCdSZfsTP10i2rHfBJctG%2F432lD%2BpfHo%3D&reserved=0 > > > > Gustavo A. R. Silva (14): > > drm/amd/pm: Replace one-element array with flexible-array member > > drm/amd/pm: Replace one-element array with flexible-array member in > > struct vi_dpm_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_clock_array > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_uvd_clock_voltage_dependency_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_acp_clock_voltage_dependency_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_phase_shedding_limits_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_vce_clock_voltage_dependency_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_cac_leakage_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_samu_clock_voltage_dependency_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_ppt_v1_clock_voltage_dependency_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_ppt_v1_mm_clock_voltage_dependency_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_ppt_v1_voltage_lookup_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > phm_ppt_v1_pcie_table > > drm/amd/pm: Replace one-element array with flexible-array in struct > > ATOM_Vega10_GFXCLK_Dependency_Table > > > > drivers/gpu/drm/amd/pm/inc/hwmgr.h | 20 ++--- > > .../drm/amd/pm/powerplay/hwmgr/hwmgr_ppt.h | 8 +- > > .../powerplay/hwmgr/process_pptables_v1_0.c | 85 +++++++----------- > > .../amd/pm/powerplay/hwmgr/processpptables.c | 85 +++++++----------- > > .../drm/amd/pm/powerplay/hwmgr/smu8_hwmgr.c | 2 +- > > .../drm/amd/pm/powerplay/hwmgr/smu_helper.c | 5 +- > > .../amd/pm/powerplay/hwmgr/vega10_pptable.h | 2 +- > > .../powerplay/hwmgr/vega10_processpptables.c | 88 ++++++------------- > > 8 files changed, 107 insertions(+), 188 deletions(-) > > > _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
