91a8c2a5b4
The code has the following problems: - it uses a single global 'fx_scratch' area that multiple CPUs could write into simultaneously, in theory. - it wastes 512 bytes of .data for something that is only rarely used. Fix this by moving the state buffer to the stack. Note that while this is 512 bytes, we don't ever call this function in very deep callchains, so its stack usage should not be a problem. Also add comments to explain the magic 0x0000ffbf default value. Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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| .. | ||
| core.c | ||
| init.c | ||
| Makefile | ||
| xsave.c | ||