| Message ID | 20241210024119.2488608-12-kaleshsingh@google.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | mm: Introduce arch_mmap_hint() | expand |
Hi Kalesh, kernel test robot noticed the following build warnings: [auto build test WARNING on akpm-mm/mm-everything] url: https://github.com/intel-lab-lkp/linux/commits/Kalesh-Singh/mm-Introduce-generic_mmap_hint/20241210-104424 base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything patch link: https://lore.kernel.org/r/20241210024119.2488608-12-kaleshsingh%40google.com patch subject: [PATCH mm-unstable 11/17] mm: sh: Introduce arch_mmap_hint() config: sh-randconfig-001-20241210 (https://download.01.org/0day-ci/archive/20241210/202412102044.uIAN0clk-lkp@intel.com/config) compiler: sh4-linux-gcc (GCC) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241210/202412102044.uIAN0clk-lkp@intel.com/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202412102044.uIAN0clk-lkp@intel.com/ All warnings (new ones prefixed by >>): arch/sh/mm/mmap.c: In function 'arch_get_unmapped_area': >> arch/sh/mm/mmap.c:79:32: warning: unused variable 'vma' [-Wunused-variable] 79 | struct vm_area_struct *vma; | ^~~ >> arch/sh/mm/mmap.c:78:27: warning: unused variable 'mm' [-Wunused-variable] 78 | struct mm_struct *mm = current->mm; | ^~ arch/sh/mm/mmap.c: In function 'arch_get_unmapped_area_topdown': arch/sh/mm/mmap.c:117:32: warning: unused variable 'vma' [-Wunused-variable] 117 | struct vm_area_struct *vma; | ^~~ vim +/vma +79 arch/sh/mm/mmap.c 2261b9c7c2357a0 Kalesh Singh 2024-12-09 73 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 74 unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, 25d4054cc97484f Mark Brown 2024-09-04 75 unsigned long len, unsigned long pgoff, unsigned long flags, 25d4054cc97484f Mark Brown 2024-09-04 76 vm_flags_t vm_flags) 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 77 { 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 @78 struct mm_struct *mm = current->mm; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 @79 struct vm_area_struct *vma; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 80 int do_colour_align; b80fa3cbb78c0fb Rick Edgecombe 2024-03-25 81 struct vm_unmapped_area_info info = {}; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 82 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 83 if (flags & MAP_FIXED) { 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 84 /* We do not accept a shared mapping if it would violate 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 85 * cache aliasing constraints. 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 86 */ e77414e0aad6a1b Al Viro 2009-12-05 87 if ((flags & MAP_SHARED) && e77414e0aad6a1b Al Viro 2009-12-05 88 ((addr - (pgoff << PAGE_SHIFT)) & shm_align_mask)) 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 89 return -EINVAL; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 90 return addr; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 91 } 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 92 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 93 if (unlikely(len > TASK_SIZE)) 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 94 return -ENOMEM; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 95 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 96 do_colour_align = 0; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 97 if (filp || (flags & MAP_SHARED)) 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 98 do_colour_align = 1; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 99 2261b9c7c2357a0 Kalesh Singh 2024-12-09 100 addr = arch_mmap_hint(filp, addr, len, pgoff, flags); 2261b9c7c2357a0 Kalesh Singh 2024-12-09 101 if (addr) 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 102 return addr; 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 103 b4265f12340f809 Michel Lespinasse 2012-12-11 104 info.length = len; b4265f12340f809 Michel Lespinasse 2012-12-11 105 info.low_limit = TASK_UNMAPPED_BASE; b4265f12340f809 Michel Lespinasse 2012-12-11 106 info.high_limit = TASK_SIZE; b4265f12340f809 Michel Lespinasse 2012-12-11 107 info.align_mask = do_colour_align ? (PAGE_MASK & shm_align_mask) : 0; b4265f12340f809 Michel Lespinasse 2012-12-11 108 info.align_offset = pgoff << PAGE_SHIFT; b4265f12340f809 Michel Lespinasse 2012-12-11 109 return vm_unmapped_area(&info); 4a4a9be3ebdbf17 Paul Mundt 2008-11-12 110 } ee1acbfabd5270b Paul Mundt 2009-05-07 111
diff --git a/arch/sh/include/asm/pgtable.h b/arch/sh/include/asm/pgtable.h index 729f5c6225fb..072dbe038808 100644 --- a/arch/sh/include/asm/pgtable.h +++ b/arch/sh/include/asm/pgtable.h @@ -149,5 +149,6 @@ static inline bool pte_access_permitted(pte_t pte, bool write) /* arch/sh/mm/mmap.c */ #define HAVE_ARCH_UNMAPPED_AREA #define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN +#define HAVE_ARCH_MMAP_HINT #endif /* __ASM_SH_PGTABLE_H */ diff --git a/arch/sh/mm/mmap.c b/arch/sh/mm/mmap.c index c442734d9b0c..5c96055dd5f5 100644 --- a/arch/sh/mm/mmap.c +++ b/arch/sh/mm/mmap.c @@ -51,6 +51,26 @@ static inline unsigned long COLOUR_ALIGN(unsigned long addr, return base + off; } +unsigned long arch_mmap_hint(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, + unsigned long flags) +{ + int do_color_align = 0; + + if (!addr) + return 0; + + if (filp || (flags & MAP_SHARED)) + do_color_align = 1; + + if (do_color_align) + addr = COLOUR_ALIGN(addr, pgoff); + else + addr = PAGE_ALIGN(addr); + + return generic_mmap_hint(filp, addr, len, pgoff, flags); +} + unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, unsigned long len, unsigned long pgoff, unsigned long flags, vm_flags_t vm_flags) @@ -77,17 +97,9 @@ unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, if (filp || (flags & MAP_SHARED)) do_colour_align = 1; - if (addr) { - if (do_colour_align) - addr = COLOUR_ALIGN(addr, pgoff); - else - addr = PAGE_ALIGN(addr); - - vma = find_vma(mm, addr); - if (TASK_SIZE - len >= addr && - (!vma || addr + len <= vm_start_gap(vma))) - return addr; - } + addr = arch_mmap_hint(filp, addr, len, pgoff, flags); + if (addr) + return addr; info.length = len; info.low_limit = TASK_UNMAPPED_BASE; @@ -126,17 +138,9 @@ arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, do_colour_align = 1; /* requesting a specific address */ - if (addr) { - if (do_colour_align) - addr = COLOUR_ALIGN(addr, pgoff); - else - addr = PAGE_ALIGN(addr); - - vma = find_vma(mm, addr); - if (TASK_SIZE - len >= addr && - (!vma || addr + len <= vm_start_gap(vma))) - return addr; - } + addr = arch_mmap_hint(filp, addr, len, pgoff, flags); + if (addr) + return addr; info.flags = VM_UNMAPPED_AREA_TOPDOWN; info.length = len;
Introduce sh arch_mmap_hint() and define HAVE_ARCH_MMAP_HINT. This is a preparatory patch, no functional change is introduced. Signed-off-by: Kalesh Singh <kaleshsingh@google.com> --- arch/sh/include/asm/pgtable.h | 1 + arch/sh/mm/mmap.c | 48 +++++++++++++++++++---------------- 2 files changed, 27 insertions(+), 22 deletions(-)