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authorJames Bottomley <James.Bottomley@HansenPartnership.com>2019-10-11 09:02:59 -0700
committerJarkko Sakkinen <jarkko.sakkinen@linux.intel.com>2019-11-12 21:45:37 +0200
commit44abdb377b7c399dfec48de7252c564bdde8d26e (patch)
tree11b24209034b5dc69aeeab8227a4c63bb5f5f504 /security/keys
parentf1689114acc5e89a196fec6d732dae3e48edb6ad (diff)
tpm: use GFP_KERNEL instead of GFP_HIGHMEM for tpm_buf
The current code uses GFP_HIGHMEM, which is wrong because GFP_HIGHMEM (on 32 bit systems) is memory ordinarily inaccessible to the kernel and should only be used for allocations affecting userspace. In order to make highmem visible to the kernel on 32 bit it has to be kmapped, which consumes valuable entries in the kmap region. Since the tpm_buf is only ever used in the kernel, switch to using a GFP_KERNEL allocation so as not to waste kmap space on 32 bits. Reviewed-by: Jerry Snitselaar <jsnitsel@redhat.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com> Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>
Diffstat (limited to 'security/keys')
0 files changed, 0 insertions, 0 deletions