forked from pool/kexec-tools
080f64dafa
- Update to version 2.0.14 (bsc#1039937, FATE#320672, FATE#320671) Changelog: http://git.kernel.org/cgit/utils/kernel/kexec/kexec-tools.git/log/?id=refs/tags/v2.0.13..v2.0.14 - Backport upstream fixes (bsc#1039937, FATE#320672, FATE#320671) 0001-kexec-tools-2.0.14.git.patch 0002-ppc64-Reduce-number-of-ELF-LOAD-segments.patch 0003-kexec-Increase-the-upper-limit-for-RAM-segments.patch 0004-alpha-add-missing-__NR_kexec_load-definition.patch 0005-kexec-implemented-XEN-KEXEC-STATUS-to-determine-if-a.patch 0006-kexec-Remove-redundant-space-from-help-message.patch 0007-purgatory-Add-purgatory.map-and-purgatory.ro.sym-to-.patch 0008-kexec-Add-option-to-get-crash-kernel-region-size.patch 0009-crashdump-arm-Add-get_crash_kernel_load_range-functi.patch 0010-crashdump-arm64-Add-get_crash_kernel_load_range-func.patch 0011-crashdump-cris-Add-get_crash_kernel_load_range-funct.patch 0012-crashdump-ia64-Add-get_crash_kernel_load_range-funct.patch 0013-crashdump-m68k-Add-get_crash_kernel_load_range-funct.patch 0014-crashdump-mips-Add-get_crash_kernel_load_range-funct.patch 0015-crashdump-ppc-Add-get_crash_kernel_load_range-functi.patch 0016-crashdump-ppc64-Add-get_crash_kernel_load_range-func.patch 0017-crashdump-s390-Add-get_crash_kernel_load_range-funct.patch 0018-crashdump-sh-Add-get_crash_kernel_load_range-functio.patch 0019-gitignore-add-two-generated-files-in-purgatory.patch 0020-Only-print-debug-message-when-failed-to-serach-for-k.patch 0021-build_mem_phdrs-check-if-p_paddr-is-invalid.patch 0022-uImage-fix-realloc-pointer-confusion.patch 0023-uImage-Fix-uImage_load-for-little-endian-machines.patch 0024-uImage-Add-new-IH_ARCH_xxx-definitions.patch 0025-uImage-use-char-instead-of-unsigned-char-for-uImage_.patch 0026-uImage-use-char-instead-of-unsigned-char-for-uImage_.patch 0027-arm64-add-uImage-support.patch OBS-URL: https://build.opensuse.org/request/show/500203 OBS-URL: https://build.opensuse.org/package/show/Kernel:kdump/kexec-tools?expand=0&rev=83
80 lines
2.6 KiB
Diff
80 lines
2.6 KiB
Diff
From c95df0e099b14757de483245d7b1b45e2d6e2c91 Mon Sep 17 00:00:00 2001
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From: AKASHI Takahiro <takahiro.akashi@linaro.org>
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Date: Wed, 17 May 2017 14:51:41 +0900
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Subject: [PATCH 35/45] kexec: extend the semantics of
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kexec_iomem_for_each_line
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The current kexec_iomem_for_each_line() counts up all the lines for which
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a callback function returns zero(0) or positive, and otherwise it stops
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further scanning.
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This behavior is inconvenient in some cases. For instance, on arm64, we want
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to count up "System RAM" entries, but need to skip "reserved" entries.
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So this patch extends the semantics so that we will continue to scan
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succeeding entries but not count lines for which a callback function
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returns positive.
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The current users of kexec_iomem_for_each_line(), arm, sh and x86, will not
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be affected by this change because
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* arm
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The callback function only returns -1 or 0, and the return value of
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kexec_iomem_for_each_line() will never be used.
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* sh, x86
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The callback function may return (-1 for sh,) 0 or 1, but always returns
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1 once we have reached the maximum number of entries allowed.
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Even so the current kexec_iomem_for_each_line() counts them up.
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This change actually fixes this bug.
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Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
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Tested-by: David Woodhouse <dwmw@amazon.co.uk>
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Tested-by: Pratyush Anand <panand@redhat.com>
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Signed-off-by: Simon Horman <horms@verge.net.au>
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---
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kexec/kexec-iomem.c | 15 ++++++++++-----
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1 file changed, 10 insertions(+), 5 deletions(-)
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diff --git a/kexec/kexec-iomem.c b/kexec/kexec-iomem.c
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index 7ec385371a2c..b5b52b1c0803 100644
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--- a/kexec/kexec-iomem.c
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+++ b/kexec/kexec-iomem.c
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@@ -18,6 +18,9 @@
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* Iterate over each line in the file returned by proc_iomem(). If match is
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* NULL or if the line matches with our match-pattern then call the
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* callback if non-NULL.
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+ * If match is NULL, callback should return a negative if error.
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+ * Otherwise the interation goes on, incrementing nr but only if callback
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+ * returns 0 (matched).
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*
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* Return the number of lines matched.
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*/
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@@ -37,7 +40,7 @@ int kexec_iomem_for_each_line(char *match,
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char *str;
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int consumed;
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int count;
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- int nr = 0;
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+ int nr = 0, ret;
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fp = fopen(iomem, "r");
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if (!fp)
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@@ -50,11 +53,13 @@ int kexec_iomem_for_each_line(char *match,
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str = line + consumed;
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size = end - start + 1;
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if (!match || memcmp(str, match, strlen(match)) == 0) {
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- if (callback
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- && callback(data, nr, str, start, size) < 0) {
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- break;
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+ if (callback) {
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+ ret = callback(data, nr, str, start, size);
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+ if (ret < 0)
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+ break;
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+ else if (ret == 0)
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+ nr++;
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}
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- nr++;
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}
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}
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--
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2.13.0
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