Revision 74ca317c26a3f8543203b61d262c0ab2e30c384e authored by Vivek Goyal on 29 August 2014, 22:18:46 UTC, committed by Linus Torvalds on 29 August 2014, 23:28:16 UTC
Currently new system call kexec_file_load() and all the associated code compiles if CONFIG_KEXEC=y. But new syscall also compiles purgatory code which currently uses gcc option -mcmodel=large. This option seems to be available only gcc 4.4 onwards. Hiding new functionality behind a new config option will not break existing users of old gcc. Those who wish to enable new functionality will require new gcc. Having said that, I am trying to figure out how can I move away from using -mcmodel=large but that can take a while. I think there are other advantages of introducing this new config option. As this option will be enabled only on x86_64, other arches don't have to compile generic kexec code which will never be used. This new code selects CRYPTO=y and CRYPTO_SHA256=y. And all other arches had to do this for CONFIG_KEXEC. Now with introduction of new config option, we can remove crypto dependency from other arches. Now CONFIG_KEXEC_FILE is available only on x86_64. So whereever I had CONFIG_X86_64 defined, I got rid of that. For CONFIG_KEXEC_FILE, instead of doing select CRYPTO=y, I changed it to "depends on CRYPTO=y". This should be safer as "select" is not recursive. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Cc: Eric Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Tested-by: Shaun Ruffell <sruffell@digium.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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File | Mode | Size |
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00README.txt | -rw-r--r-- | 1.4 KB |
Kconfig | -rw-r--r-- | 1.2 KB |
Makefile | -rw-r--r-- | 336 bytes |
callback.c | -rw-r--r-- | 432 bytes |
commpage.c | -rw-r--r-- | 866 bytes |
commpage.h | -rw-r--r-- | 676 bytes |
dyntrans.c | -rw-r--r-- | 4.1 KB |
emulate.c | -rw-r--r-- | 60.9 KB |
interrupt.c | -rw-r--r-- | 5.7 KB |
interrupt.h | -rw-r--r-- | 2.0 KB |
locore.S | -rw-r--r-- | 14.4 KB |
mips.c | -rw-r--r-- | 27.6 KB |
opcode.h | -rw-r--r-- | 615 bytes |
stats.c | -rw-r--r-- | 1.4 KB |
tlb.c | -rw-r--r-- | 20.1 KB |
trace.h | -rw-r--r-- | 1.1 KB |
trap_emul.c | -rw-r--r-- | 14.1 KB |
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