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| author | Ingo Molnar <mingo@kernel.org> | 2015-03-03 07:34:33 +0100 |
|---|---|---|
| committer | Matt Fleming <matt.fleming@intel.com> | 2015-04-01 12:46:22 +0100 |
| commit | 23a0d4e8fa6d3a1d7fb819f79bcc0a3739c30ba9 (patch) | |
| tree | a39fccdee6dc1a89756331aac0c4db066060e96c /arch/x86/include/asm/efi.h | |
| parent | fed6cefe3b6e862dcc74d07324478caa07e84eaf (diff) | |
| download | lwn-23a0d4e8fa6d3a1d7fb819f79bcc0a3739c30ba9.tar.gz lwn-23a0d4e8fa6d3a1d7fb819f79bcc0a3739c30ba9.zip | |
efi: Disable interrupts around EFI calls, not in the epilog/prolog calls
Tapasweni Pathak reported that we do a kmalloc() in efi_call_phys_prolog()
on x86-64 while having interrupts disabled, which is a big no-no, as
kmalloc() can sleep.
Solve this by removing the irq disabling from the prolog/epilog calls
around EFI calls: it's unnecessary, as in this stage we are single
threaded in the boot thread, and we don't ever execute this from
interrupt contexts.
Reported-by: Tapasweni Pathak <tapaswenipathak@gmail.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
Diffstat (limited to 'arch/x86/include/asm/efi.h')
0 files changed, 0 insertions, 0 deletions