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Fix ARC700 mmap alignment and optimize content clipping workflow #1313

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Fix ARC700 mmap alignment and optimize content clipping workflow #1313

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98e1df3
Update devtree.c
nitrix4ly Aug 4, 2025
e0554c6
Update mmap.c
nitrix4ly Aug 4, 2025
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8 changes: 6 additions & 2 deletions arch/arc/kernel/devtree.c
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,11 @@ static unsigned int __initdata arc_base_baud;

unsigned int __init arc_early_base_baud(void)
{
return arc_base_baud/16;
#define BASE_BAUD_DIVISOR 16

unsigned int __init arc_early_base_baud(void)
{
return arc_base_baud / BASE_BAUD_DIVISOR;
}

static void __init arc_set_early_base_baud(unsigned long dt_root)
Expand All @@ -34,7 +38,7 @@ static void __init arc_set_early_base_baud(unsigned long dt_root)
arc_base_baud = 50000000; /* Fixed default 50MHz */
}
#else
#define arc_set_early_base_baud(dt_root)
#define arc_set_early_base_baud(dt_root) do {} while (0)
#endif

static const void * __init arch_get_next_mach(const char *const **match)
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4 changes: 4 additions & 0 deletions arch/arc/mm/mmap.c
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Expand Up @@ -56,6 +56,10 @@ arch_get_unmapped_area(struct file *filp, unsigned long addr,
info.low_limit = mm->mmap_base;
info.high_limit = TASK_SIZE;
info.align_offset = pgoff << PAGE_SHIFT;

if (flags & MAP_SHARED)
info.align_mask = SHMLBA - 1;

return vm_unmapped_area(&info);
}

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