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From: Miroslav Benes <mbenes@suse.cz>
To: Petr Mladek <pmladek@suse.com>
Cc: Jiri Kosina <jikos@kernel.org>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Joe Lawrence <joe.lawrence@redhat.com>,
	Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>,
	Nicolai Stange <nstange@suse.de>,
	live-patching@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [RFC 3/5] livepatch: Allow to distinguish different version of system state changes
Date: Fri, 21 Jun 2019 13:27:58 +0200 (CEST)
Message-ID: <alpine.LSU.2.21.1906211326140.5415@pobox.suse.cz> (raw)
In-Reply-To: <20190611135627.15556-4-pmladek@suse.com>

> +/* Check if the patch is able to deal with the given system state. */
> +static bool klp_is_state_compatible(struct klp_patch *patch,
> +                                 struct klp_state *state)
> +{
> +     struct klp_state *new_state;
> +
> +     new_state = klp_get_state(patch, state->id);
> +
> +     if (new_state)
> +             return new_state->version < state->version ? false : true;

return new_state->version >= state->version;

?

> +     /* Cumulative livepatch must handle all already modified states. 
*/
> +     return patch->replace ? false : true;

return !patch->replace;

?

> + * Check if the new livepatch will not break the existing system states.
> + * Cumulative patches must handle all already modified states.
> + * Non-cumulative patches can touch already modified states.
> + */
> +bool klp_is_patch_compatible(struct klp_patch *patch)

make C=1 kernel/livepatch/state.o

kernel/livepatch/state.c:107:6: warning: symbol 'klp_is_patch_compatible' was not declared. Should it be static?

#include "state.h" in state.c would solve it.

Miroslav

  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20190611135627.15556-1-pmladek@suse.com>
2019-06-21 13:19 ` [RFC 0/5] livepatch: new API to track " Joe Lawrence
     [not found] ` <20190611135627.15556-3-pmladek@suse.com>
2019-06-21 13:43   ` [RFC 2/5] livepatch: Basic " Joe Lawrence
2019-06-24  9:32   ` Nicolai Stange
     [not found] ` <20190611135627.15556-5-pmladek@suse.com>
2019-06-21 14:15   ` [RFC 4/5] livepatch: Documentation of the new API for tracking " Joe Lawrence
     [not found] ` <20190611135627.15556-6-pmladek@suse.com>
2019-06-21 11:54   ` [RFC 5/5] livepatch: Selftests of the " Miroslav Benes
2019-06-21 14:19   ` Joe Lawrence
2019-06-24  9:27 ` [RFC 0/5] livepatch: new API to track " Nicolai Stange
     [not found] ` <20190611135627.15556-4-pmladek@suse.com>
2019-06-21 11:27   ` Miroslav Benes [this message]
2019-06-21 14:09   ` [RFC 3/5] livepatch: Allow to distinguish different version of " Joe Lawrence
2019-06-21 15:00     ` Joe Lawrence
2019-06-24 10:26   ` Nicolai Stange
2019-07-18 11:38     ` Petr Mladek
2019-07-18  9:08   ` Petr Mladek

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