fs/mmap/msync: support msync #13052
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fs/mmap/msync: support msync #13052
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Signed-off-by: wanggang26 <wanggang26@xiaomi.com>
Summary: 1.Added msync callback in struct mm_map_entry_s 2.Added msync API in fs_msync.c 3.Added static msync_rammap for rammap. Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
Summary: In rammap: 1.0 - User 2.1 - Kernel 3.2 - XIP Therefore we need to use 2 bits to represent the type Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
Summary: When restoring rammap fpos, we check the return value to avoid potential problems caused by no error return if the restore fails. Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
CC: obstack/lib_obstack_printf.c "mmap/fs_rammap.c", line 126: warning apache#188-D: enumerated type mixed with another type enum mm_map_type_e type = (uintptr_t)entry->priv.p & 3; ^ Signed-off-by: guoshichao <guoshichao@xiaomi.com>
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Summary
The msync API implemented base by #5997 and #8026.
Follow: https://man7.org/linux/man-pages/man2/msync.2.html
Impact
Support msync
Testing
Local test pass