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In the function kexec_iomem_for_each_line(), it is better to
check the callback first, it can return directly if the callback
is NULL.
Signed-off-by: Jinyang He <hejinyang@loongson.cn>
Signed-off-by: Simon Horman <horms@verge.net.au>
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The current kexec_iomem_for_each_line() counts up all the lines for which
a callback function returns zero(0) or positive, and otherwise it stops
further scanning.
This behavior is inconvenient in some cases. For instance, on arm64, we want
to count up "System RAM" entries, but need to skip "reserved" entries.
So this patch extends the semantics so that we will continue to scan
succeeding entries but not count lines for which a callback function
returns positive.
The current users of kexec_iomem_for_each_line(), arm, sh and x86, will not
be affected by this change because
* arm
The callback function only returns -1 or 0, and the return value of
kexec_iomem_for_each_line() will never be used.
* sh, x86
The callback function may return (-1 for sh,) 0 or 1, but always returns
1 once we have reached the maximum number of entries allowed.
Even so the current kexec_iomem_for_each_line() counts them up.
This change actually fixes this bug.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Tested-by: David Woodhouse <dwmw@amazon.co.uk>
Tested-by: Pratyush Anand <panand@redhat.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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MUSL doesn't support %L except for floating-point arguments; therefore,
%ll must be used instead with integer arguments.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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Since "start" and "end" in kexec_iomem_for_each_line
are unsigned long long, this patch makes "callback"s
accept unsigned-long-long-type parameters.
Signed-off-by: Wei Jitao <weijitao@huawei.com>
Signed-off-by: Liu Hua <sdu.liu@huawei.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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Signed-off-by: Simon Horman <horms@verge.net.au>
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This reduces the kexec-tools' demands on the capabilities of the
toolchain, and improves standards conformance, without really changing
maintenance complexity.
Signed-off-by: Jamey Sharp <jamey@thetovacompany.com>
Signed-off-by: Simon Horman <horms@verge.net.au>
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Removes the machine parameter to proc_iomem() which is no
longer of any use.
Signed-off-by: Simon Horman <horms@verge.net.au>
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On ia64 XEN it is sometimes neccessary to use an alternate location for the
information that is usually provided by /proc/iomem. By having the path
returned by a function, which can be overriden on a per-architecture basis,
it is possible for ia64 XEN to make use of existing generic code. Hopefully
other achitectures can use this infastructure as the need arises.
If the machine parameter is zero, then iomem file relating to the currently
running kernel should be returned. If the machine parameter is non-zero
then iomem file, relating to the underlying hypervisor, should be returned.
In the simple case, these will be the same file.
Signed-off-by: Simon Horman <horms@verge.net.au>
kexec/arch/i386/crashdump-x86.c | 4 ++--
kexec/arch/i386/kexec-x86.c | 2 +-
kexec/arch/i386/x86-linux-setup.c | 2 +-
kexec/arch/ia64/crashdump-ia64.c | 9 +++++----
kexec/arch/ia64/kexec-elf-ia64.c | 2 +-
kexec/arch/ia64/kexec-ia64.c | 5 +++--
kexec/arch/ppc/kexec-ppc.c | 2 +-
kexec/arch/s390/kexec-s390.c | 5 +++--
kexec/arch/x86_64/crashdump-x86_64.c | 10 +++++-----
kexec/arch/x86_64/kexec-x86_64.c | 2 +-
kexec/crashdump-xen.c | 6 ++++--
kexec/kexec-iomem.c | 31 +++++++++++++++++++++++--------
kexec/kexec.h | 6 +++---
13 files changed, 53 insertions(+), 33 deletions(-)
9079040b40f643cfc9eb3d425dffa0ca8fd573e1
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kexec-tools: Introduce kexec-iomem.c and /proc/iomem parsing code V2
This patch adds the new file kexec-iomem.c that implements code to parse
/proc/iomem line-by-line. The following patches make use of this code
- especially the Xen-code that use /proc/iomem to get crash note information.
This version renames a function to parse_iomem_single() as suggested by Vivek.
We also now export kexec_iomem_for_each_line() in a header file.
Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Removed trailing whitespace
Signed-off-by: Simon Horman <horms@verge.net.au>
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