Re: [PATCH] compat: fs: Generic compat_sys_sendfile implementation

[David Miller]

From: Catalin Marinas <catalin.marinas@xxxxxxx>
Date: Tue, 18 Sep 2012 18:02:06 +0100

> This function is used by sparc, powerpc and arm64 for compat support.
> The patch adds a generic implementation which calls do_sendfile()
> directly and avoids set_fs().
> 
> The sparc architecture has wrappers for the sign extensions while
> powerpc relies on the compiler to do the this. The patch adds a wrapper
> for powerpc to handle the u32->int type conversion.
> 
> compat_sys_sendfile64() can be replaced by a sys_sendfile() call since
> compat_loff_t has the same size as off_t on a 64-bit system. On powerpc,
> similar wrapper needs to be added for the u32->int conversion.
> 
> The reason for a single patch covering both powerpc and sparc is to keep
> it bisectable (and simple), otherwise kernel building may fail with
> mismatched function declarations.
> 
> Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>

Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/