Hi, Laura
On 11/29/16 at 10:55am, Laura Abbott wrote:
>
> __pa_symbol is the correct api to get the physical address of kernel
> symbols. Switch to it to allow for better debug checking.
>
I assume __pa_symbol is faster than __pa, but it still need some testing
on all arches which support kexec.
But seems long long ago there is a commit e3ebadd95cb in the commit log
I see below from:
"we should deprecate __pa_symbol(), and preferably __pa() too - and
just use "virt_to_phys()" instead, which is is more readable and has
nicer semantics."
But maybe in modern code __pa_symbol is prefered I may miss background.
virt_to_phys still sounds more readable now for me though.
> Signed-off-by: Laura Abbott <labbott at redhat.com>
> ---
> Found during review of the kernel. Untested.
> ---
> kernel/kexec_core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/kexec_core.c b/kernel/kexec_core.c
> index 5616755..e1b625e 100644
> --- a/kernel/kexec_core.c
> +++ b/kernel/kexec_core.c
> @@ -1397,7 +1397,7 @@ void __weak arch_crash_save_vmcoreinfo(void)
>
> phys_addr_t __weak paddr_vmcoreinfo_note(void)
> {
> - return __pa((unsigned long)(char *)&vmcoreinfo_note);
> + return __pa_symbol((unsigned long)(char *)&vmcoreinfo_note);
> }
>
> static int __init crash_save_vmcoreinfo_init(void)
> --
> 2.7.4
>
>
> _______________________________________________
> kexec mailing list
> kexec at lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/kexec
Thanks
Dave
