https://github.com/torvalds/linux
Many places in drivers/ file systems, error was handled in a common way like below: ret = (ret == -ENOMEM) ? VM_FAULT_OOM : VM_FAULT_SIGBUS; vmf_error() will replace this and return vm_fault_t type err. A lot of drivers and filesystems currently have a rather complex mapping of errno-to-VM_FAULT code. We have been able to eliminate a lot of it by just returning VM_FAULT codes directly from functions which are called exclusively from the fault handling path. Some functions can be called both from the fault handler and other context which are expecting an errno, so they have to continue to return an errno. Some users still need to choose different behaviour for different errnos, but vmf_error() captures the essential error translation that's common to all users, and those that need to handle additional errors can handle them first. Link: http://lkml.kernel.org/r/20180510174826.GA14268@jordon-HP-15-Notebook-PC Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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include/linux/mm.h: add new inline function vmf_error()
File | Mode | Size |
---|---|---|
Makefile | -rw-r--r-- | 103 bytes |
braille.c | -rw-r--r-- | 1001 bytes |
braille.h | -rw-r--r-- | 1.1 KB |
console_cmdline.h | -rw-r--r-- | 366 bytes |
internal.h | -rw-r--r-- | 2.2 KB |
printk.c | -rw-r--r-- | 82.1 KB |
printk_safe.c | -rw-r--r-- | 10.8 KB |
Computing file changes ...