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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* efibc: control EFI bootloaders which obey LoaderEntryOneShot var
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* Copyright (c) 2013-2016, Intel Corporation.
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*/
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#define pr_fmt(fmt) "efibc: " fmt
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#include <linux/efi.h>
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#include <linux/module.h>
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#include <linux/reboot.h>
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#include <linux/slab.h>
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#include <linux/ucs2_string.h>
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#define MAX_DATA_LEN 512
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static int efibc_set_variable(efi_char16_t *name, efi_char16_t *value,
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unsigned long len)
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{
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efi_status_t status;
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status = efi.set_variable(name, &LINUX_EFI_LOADER_ENTRY_GUID,
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EFI_VARIABLE_NON_VOLATILE
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| EFI_VARIABLE_BOOTSERVICE_ACCESS
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| EFI_VARIABLE_RUNTIME_ACCESS,
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len * sizeof(efi_char16_t), value);
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if (status != EFI_SUCCESS) {
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pr_err("failed to set EFI variable: 0x%lx\n", status);
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return -EIO;
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}
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return 0;
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}
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static int efibc_reboot_notifier_call(struct notifier_block *notifier,
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unsigned long event, void *data)
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{
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efi_char16_t *reason = event == SYS_RESTART ? L"reboot"
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: L"shutdown";
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const u8 *str = data;
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efi_char16_t *wdata;
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unsigned long l;
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int ret;
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ret = efibc_set_variable(L"LoaderEntryRebootReason", reason,
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ucs2_strlen(reason));
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if (ret || !data)
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return NOTIFY_DONE;
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wdata = kmalloc_objs(efi_char16_t, MAX_DATA_LEN);
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if (!wdata)
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return NOTIFY_DONE;
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for (l = 0; l < MAX_DATA_LEN - 1 && str[l] != '\0'; l++)
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wdata[l] = str[l];
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wdata[l] = L'\0';
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efibc_set_variable(L"LoaderEntryOneShot", wdata, l);
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kfree(wdata);
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return NOTIFY_DONE;
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}
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static struct notifier_block efibc_reboot_notifier = {
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.notifier_call = efibc_reboot_notifier_call,
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};
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static int __init efibc_init(void)
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{
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int ret;
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if (!efi_rt_services_supported(EFI_RT_SUPPORTED_SET_VARIABLE))
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return -ENODEV;
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ret = register_reboot_notifier(&efibc_reboot_notifier);
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if (ret)
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pr_err("unable to register reboot notifier\n");
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return ret;
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}
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module_init(efibc_init);
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static void __exit efibc_exit(void)
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{
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unregister_reboot_notifier(&efibc_reboot_notifier);
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}
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module_exit(efibc_exit);
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MODULE_AUTHOR("Jeremy Compostella <jeremy.compostella@intel.com>");
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MODULE_AUTHOR("Matt Gumbel <matthew.k.gumbel@intel.com");
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MODULE_DESCRIPTION("EFI Bootloader Control");
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MODULE_LICENSE("GPL v2");
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