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linux/lib/earlycpio.c

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lib: Add early cpio decoder Add a simple cpio decoder without library dependencies for the purpose of extracting components from the initramfs blob for early kernel uses. Intended consumers so far are microcode and ACPI override. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1349043837-22659-2-git-send-email-trenn@suse.de Cc: Len Brown <lenb@kernel.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-10-01 00:23:52 +02:00
earlycpio.c: Fix the confusing comment of find_cpio_data(). The comments of find_cpio_data() says: * @offset: When a matching file is found, this is the offset to the * beginning of the cpio. ...... But according to the code, dptr = PTR_ALIGN(p + ch[C_NAMESIZE], 4); nptr = PTR_ALIGN(dptr + ch[C_FILESIZE], 4); .... *offset = (long)nptr - (long)data; /* data is the cpio file */ @offset is the offset of the next file, not the matching file itself. This is confused and may cause unnecessary waste of time to debug. So fix it. As Tejun Heo suggested, rename @offset to @nextoff which is more clear to users. And also adjust the new comments. Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Reviewed-by: Tejun Heo <tj@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-08-14 17:37:07 +08:00
lib: Add early cpio decoder Add a simple cpio decoder without library dependencies for the purpose of extracting components from the initramfs blob for early kernel uses. Intended consumers so far are microcode and ACPI override. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1349043837-22659-2-git-send-email-trenn@suse.de Cc: Len Brown <lenb@kernel.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-10-01 00:23:52 +02:00
earlycpio.c: Fix the confusing comment of find_cpio_data(). The comments of find_cpio_data() says: * @offset: When a matching file is found, this is the offset to the * beginning of the cpio. ...... But according to the code, dptr = PTR_ALIGN(p + ch[C_NAMESIZE], 4); nptr = PTR_ALIGN(dptr + ch[C_FILESIZE], 4); .... *offset = (long)nptr - (long)data; /* data is the cpio file */ @offset is the offset of the next file, not the matching file itself. This is confused and may cause unnecessary waste of time to debug. So fix it. As Tejun Heo suggested, rename @offset to @nextoff which is more clear to users. And also adjust the new comments. Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Reviewed-by: Tejun Heo <tj@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-08-14 17:37:07 +08:00
lib: Add early cpio decoder Add a simple cpio decoder without library dependencies for the purpose of extracting components from the initramfs blob for early kernel uses. Intended consumers so far are microcode and ACPI override. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1349043837-22659-2-git-send-email-trenn@suse.de Cc: Len Brown <lenb@kernel.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-10-01 00:23:52 +02:00
kernel: delete __cpuinit usage from all core kernel files The __cpuinit type of throwaway sections might have made sense some time ago when RAM was more constrained, but now the savings do not offset the cost and complications. For example, the fix in commit 5e427ec2d0 ("x86: Fix bit corruption at CPU resume time") is a good example of the nasty type of bugs that can be created with improper use of the various __init prefixes. After a discussion on LKML[1] it was decided that cpuinit should go the way of devinit and be phased out. Once all the users are gone, we can then finally remove the macros themselves from linux/init.h. This removes all the uses of the __cpuinit macros from C files in the core kernel directories (kernel, init, lib, mm, and include) that don't really have a specific maintainer. [1] https://lkml.org/lkml/2013/5/20/589 Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2013-06-19 14:53:51 -04:00
earlycpio.c: Fix the confusing comment of find_cpio_data(). The comments of find_cpio_data() says: * @offset: When a matching file is found, this is the offset to the * beginning of the cpio. ...... But according to the code, dptr = PTR_ALIGN(p + ch[C_NAMESIZE], 4); nptr = PTR_ALIGN(dptr + ch[C_FILESIZE], 4); .... *offset = (long)nptr - (long)data; /* data is the cpio file */ @offset is the offset of the next file, not the matching file itself. This is confused and may cause unnecessary waste of time to debug. So fix it. As Tejun Heo suggested, rename @offset to @nextoff which is more clear to users. And also adjust the new comments. Signed-off-by: Tang Chen <tangchen@cn.fujitsu.com> Reviewed-by: Zhang Yanfei <zhangyanfei@cn.fujitsu.com> Reviewed-by: Tejun Heo <tj@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2013-08-14 17:37:07 +08:00
lib: Add early cpio decoder Add a simple cpio decoder without library dependencies for the purpose of extracting components from the initramfs blob for early kernel uses. Intended consumers so far are microcode and ACPI override. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1349043837-22659-2-git-send-email-trenn@suse.de Cc: Len Brown <lenb@kernel.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-10-01 00:23:52 +02:00
lib/cpio: Make find_cpio_data()'s offset arg optional Some callers don't use it so make it optional. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1465225850-7352-4-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-06-06 17:10:44 +02:00
lib: Add early cpio decoder Add a simple cpio decoder without library dependencies for the purpose of extracting components from the initramfs blob for early kernel uses. Intended consumers so far are microcode and ACPI override. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Link: http://lkml.kernel.org/r/1349043837-22659-2-git-send-email-trenn@suse.de Cc: Len Brown <lenb@kernel.org> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2012-10-01 00:23:52 +02:00