• Arnd Bergmann's avatar
    x86/e820/32: Fix e820_search_gap() error handling on x86-32 · c19a5f35
    Arnd Bergmann authored
    GCC correctly points out that on 32-bit kernels, e820_search_gap()
    not finding a start now leads to pci_mem_start ('gapstart') being set to an
    uninitialized value:
    
      arch/x86/kernel/e820.c: In function 'e820_setup_gap':
      arch/x86/kernel/e820.c:641:16: error: 'gapstart' may be used uninitialized in this function [-Werror=maybe-uninitialized]
    
    This restores the behavior from before this cleanup:
    
      b4ed1d15 ("x86/e820: Make e820_search_gap() static and remove unused variables")
    
    ... defaulting to address 0x10000000 if nothing was found.
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Cc: Dan Williams <dan.j.williams@intel.com>
    Cc: Denys Vlasenko <dvlasenk@redhat.com>
    Cc: Linus Torvalds <torvalds@linux-foundation.org>
    Cc: Peter Zijlstra <peterz@infradead.org>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Toshi Kani <toshi.kani@hpe.com>
    Cc: Wei Yang <richard.weiyang@gmail.com>
    Fixes: b4ed1d15 ("x86/e820: Make e820_search_gap() static and remove unused variables")
    Link: http://lkml.kernel.org/r/20170111144926.695369-1-arnd@arndb.deSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    c19a5f35
e820.c 30.2 KB